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Finding the Fourth Proportional to 287,529.90, 431,294.94 and 129,573.78

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Solution

The fourth proportional to 287,529.90, 431,294.94 and 129,573.78 is: 194,360.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,529.90 : 431,294.94 = 129,573.78 : x
  2. Step 2: Convert to fraction form
    287,529.90/431,294.94 = 129,573.78/x
  3. Step 3: Cross multiply
    287,529.90x = 431,294.94 × 129,573.78
  4. Step 4: Simplify right side
    287,529.90x = 55,884,515,670.67
  5. Step 5: Solve for x
    x = 55,884,515,670.67/287,529.90
  6. Step 6: Final answer
    x = 194,360.71

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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.