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Finding the Fourth Proportional to 628,927.70, 943,391.55 and 418,975.70

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Solution

The fourth proportional to 628,927.70, 943,391.55 and 418,975.70 is: 628,463.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,927.70 : 943,391.55 = 418,975.70 : x
  2. Step 2: Convert to fraction form
    628,927.70/943,391.55 = 418,975.70/x
  3. Step 3: Cross multiply
    628,927.70x = 943,391.55 × 418,975.70
  4. Step 4: Simplify right side
    628,927.70x = 395,258,135,035.34
  5. Step 5: Solve for x
    x = 395,258,135,035.34/628,927.70
  6. Step 6: Final answer
    x = 628,463.55

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Half scale
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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.