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Finding the Fourth Proportional to 875.53, 1,207.47 and 525.61

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Solution

The fourth proportional to 875.53, 1,207.47 and 525.61 is: 724.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.53 : 1,207.47 = 525.61 : x
  2. Step 2: Convert to fraction form
    875.53/1,207.47 = 525.61/x
  3. Step 3: Cross multiply
    875.53x = 1,207.47 × 525.61
  4. Step 4: Simplify right side
    875.53x = 634,658.31
  5. Step 5: Solve for x
    x = 634,658.31/875.53
  6. Step 6: Final answer
    x = 724.88

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1.5x scale

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.