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Finding the Fourth Proportional to 386,781.43, 533,767.58 and 217,028.11

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Solution

The fourth proportional to 386,781.43, 533,767.58 and 217,028.11 is: 299,503.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,781.43 : 533,767.58 = 217,028.11 : x
  2. Step 2: Convert to fraction form
    386,781.43/533,767.58 = 217,028.11/x
  3. Step 3: Cross multiply
    386,781.43x = 533,767.58 × 217,028.11
  4. Step 4: Simplify right side
    386,781.43x = 115,842,569,066.67
  5. Step 5: Solve for x
    x = 115,842,569,066.67/386,781.43
  6. Step 6: Final answer
    x = 299,503.96

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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.