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Finding the Fourth Proportional to 947.06, 1,306.90 and 527.38

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Solution

The fourth proportional to 947.06, 1,306.90 and 527.38 is: 727.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.06 : 1,306.90 = 527.38 : x
  2. Step 2: Convert to fraction form
    947.06/1,306.90 = 527.38/x
  3. Step 3: Cross multiply
    947.06x = 1,306.90 × 527.38
  4. Step 4: Simplify right side
    947.06x = 689,230.31
  5. Step 5: Solve for x
    x = 689,230.31/947.06
  6. Step 6: Final answer
    x = 727.76

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Double scale
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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.