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Finding the Fourth Proportional to 939.07, 1,295.92 and 525.07

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Solution

The fourth proportional to 939.07, 1,295.92 and 525.07 is: 724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.07 : 1,295.92 = 525.07 : x
  2. Step 2: Convert to fraction form
    939.07/1,295.92 = 525.07/x
  3. Step 3: Cross multiply
    939.07x = 1,295.92 × 525.07
  4. Step 4: Simplify right side
    939.07x = 680,444.16
  5. Step 5: Solve for x
    x = 680,444.16/939.07
  6. Step 6: Final answer
    x = 724.60

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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.