Home / 638,905.80-958,358.70-543,917.10

Finding the Fourth Proportional to 638,905.80, 958,358.70 and 543,917.10

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Solution

The fourth proportional to 638,905.80, 958,358.70 and 543,917.10 is: 815,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,905.80 : 958,358.70 = 543,917.10 : x
  2. Step 2: Convert to fraction form
    638,905.80/958,358.70 = 543,917.10/x
  3. Step 3: Cross multiply
    638,905.80x = 958,358.70 × 543,917.10
  4. Step 4: Simplify right side
    638,905.80x = 521,267,684,863.77
  5. Step 5: Solve for x
    x = 521,267,684,863.77/638,905.80
  6. Step 6: Final answer
    x = 815,875.65

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Double scale
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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.