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Finding the Fourth Proportional to 386,781.38, 533,767.50 and 217,028.06

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Solution

The fourth proportional to 386,781.38, 533,767.50 and 217,028.06 is: 299,503.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,781.38 : 533,767.50 = 217,028.06 : x
  2. Step 2: Convert to fraction form
    386,781.38/533,767.50 = 217,028.06/x
  3. Step 3: Cross multiply
    386,781.38x = 533,767.50 × 217,028.06
  4. Step 4: Simplify right side
    386,781.38x = 115,842,522,347.21
  5. Step 5: Solve for x
    x = 115,842,522,347.21/386,781.38
  6. Step 6: Final answer
    x = 299,503.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.