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Finding the Fourth Proportional to 534,285.40, 801,428.10 and 218,637.40

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Solution

The fourth proportional to 534,285.40, 801,428.10 and 218,637.40 is: 327,956.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,285.40 : 801,428.10 = 218,637.40 : x
  2. Step 2: Convert to fraction form
    534,285.40/801,428.10 = 218,637.40/x
  3. Step 3: Cross multiply
    534,285.40x = 801,428.10 × 218,637.40
  4. Step 4: Simplify right side
    534,285.40x = 175,222,156,070.94
  5. Step 5: Solve for x
    x = 175,222,156,070.94/534,285.40
  6. Step 6: Final answer
    x = 327,956.10

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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.