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Finding the Fourth Proportional to 287,520.60, 431,125.20 and 129,564.12

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Solution

The fourth proportional to 287,520.60, 431,125.20 and 129,564.12 is: 194,276.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,520.60 : 431,125.20 = 129,564.12 : x
  2. Step 2: Convert to fraction form
    287,520.60/431,125.20 = 129,564.12/x
  3. Step 3: Cross multiply
    287,520.60x = 431,125.20 × 129,564.12
  4. Step 4: Simplify right side
    287,520.60x = 55,858,357,147.82
  5. Step 5: Solve for x
    x = 55,858,357,147.82/287,520.60
  6. Step 6: Final answer
    x = 194,276.02

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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.