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Finding the Fourth Proportional to 939.47, 1,296.47 and 525.47

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Solution

The fourth proportional to 939.47, 1,296.47 and 525.47 is: 725.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.47 : 1,296.47 = 525.47 : x
  2. Step 2: Convert to fraction form
    939.47/1,296.47 = 525.47/x
  3. Step 3: Cross multiply
    939.47x = 1,296.47 × 525.47
  4. Step 4: Simplify right side
    939.47x = 681,246.98
  5. Step 5: Solve for x
    x = 681,246.98/939.47
  6. Step 6: Final answer
    x = 725.14

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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.