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Finding the Fourth Proportional to 285,937.47, 428,909.28 and 86,259.59

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Solution

The fourth proportional to 285,937.47, 428,909.28 and 86,259.59 is: 129,390.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,937.47 : 428,909.28 = 86,259.59 : x
  2. Step 2: Convert to fraction form
    285,937.47/428,909.28 = 86,259.59/x
  3. Step 3: Cross multiply
    285,937.47x = 428,909.28 × 86,259.59
  4. Step 4: Simplify right side
    285,937.47x = 36,997,536,818.92
  5. Step 5: Solve for x
    x = 36,997,536,818.92/285,937.47
  6. Step 6: Final answer
    x = 129,390.31

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1.5x scale

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.