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Finding the Fourth Proportional to 659,494.80, 909,813.96 and 387,439.92

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Solution

The fourth proportional to 659,494.80, 909,813.96 and 387,439.92 is: 534,497.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,494.80 : 909,813.96 = 387,439.92 : x
  2. Step 2: Convert to fraction form
    659,494.80/909,813.96 = 387,439.92/x
  3. Step 3: Cross multiply
    659,494.80x = 909,813.96 × 387,439.92
  4. Step 4: Simplify right side
    659,494.80x = 352,498,247,877.28
  5. Step 5: Solve for x
    x = 352,498,247,877.28/659,494.80
  6. Step 6: Final answer
    x = 534,497.39

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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.