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Finding the Fourth Proportional to 638,123.70, 957,185.55 and 319,259.10

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Solution

The fourth proportional to 638,123.70, 957,185.55 and 319,259.10 is: 478,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,123.70 : 957,185.55 = 319,259.10 : x
  2. Step 2: Convert to fraction form
    638,123.70/957,185.55 = 319,259.10/x
  3. Step 3: Cross multiply
    638,123.70x = 957,185.55 × 319,259.10
  4. Step 4: Simplify right side
    638,123.70x = 305,590,197,226.01
  5. Step 5: Solve for x
    x = 305,590,197,226.01/638,123.70
  6. Step 6: Final answer
    x = 478,888.65

Related Problems

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Half scale
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Double scale
Find fourth proportional to 638,124.70, 957,187.05 and 319,260.10
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.