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Finding the Fourth Proportional to 387,418.28, 534,700.68 and 322,785.01

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Solution

The fourth proportional to 387,418.28, 534,700.68 and 322,785.01 is: 445,496.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,418.28 : 534,700.68 = 322,785.01 : x
  2. Step 2: Convert to fraction form
    387,418.28/534,700.68 = 322,785.01/x
  3. Step 3: Cross multiply
    387,418.28x = 534,700.68 × 322,785.01
  4. Step 4: Simplify right side
    387,418.28x = 172,593,361,667.30
  5. Step 5: Solve for x
    x = 172,593,361,667.30/387,418.28
  6. Step 6: Final answer
    x = 445,496.17

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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.