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Finding the Fourth Proportional to 742.66, 1,024.78 and 411.07

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Solution

The fourth proportional to 742.66, 1,024.78 and 411.07 is: 567.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.66 : 1,024.78 = 411.07 : x
  2. Step 2: Convert to fraction form
    742.66/1,024.78 = 411.07/x
  3. Step 3: Cross multiply
    742.66x = 1,024.78 × 411.07
  4. Step 4: Simplify right side
    742.66x = 421,253.75
  5. Step 5: Solve for x
    x = 421,253.75/742.66
  6. Step 6: Final answer
    x = 567.22

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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.