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Finding the Fourth Proportional to 947.22, 1,307.10 and 548.86

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Solution

The fourth proportional to 947.22, 1,307.10 and 548.86 is: 757.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.22 : 1,307.10 = 548.86 : x
  2. Step 2: Convert to fraction form
    947.22/1,307.10 = 548.86/x
  3. Step 3: Cross multiply
    947.22x = 1,307.10 × 548.86
  4. Step 4: Simplify right side
    947.22x = 717,414.91
  5. Step 5: Solve for x
    x = 717,414.91/947.22
  6. Step 6: Final answer
    x = 757.39

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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.