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Finding the Fourth Proportional to 390,337.11, 585,505.71 and 109,854.36

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Solution

The fourth proportional to 390,337.11, 585,505.71 and 109,854.36 is: 164,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,337.11 : 585,505.71 = 109,854.36 : x
  2. Step 2: Convert to fraction form
    390,337.11/585,505.71 = 109,854.36/x
  3. Step 3: Cross multiply
    390,337.11x = 585,505.71 × 109,854.36
  4. Step 4: Simplify right side
    390,337.11x = 64,320,355,048.40
  5. Step 5: Solve for x
    x = 64,320,355,048.40/390,337.11
  6. Step 6: Final answer
    x = 164,781.55

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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.