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Finding the Fourth Proportional to 742.70, 1,024.94 and 411.14

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Solution

The fourth proportional to 742.70, 1,024.94 and 411.14 is: 567.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.70 : 1,024.94 = 411.14 : x
  2. Step 2: Convert to fraction form
    742.70/1,024.94 = 411.14/x
  3. Step 3: Cross multiply
    742.70x = 1,024.94 × 411.14
  4. Step 4: Simplify right side
    742.70x = 421,393.83
  5. Step 5: Solve for x
    x = 421,393.83/742.70
  6. Step 6: Final answer
    x = 567.38

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Half scale
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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.