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Finding the Fourth Proportional to 456.79, 630.75 and 291.29

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Solution

The fourth proportional to 456.79, 630.75 and 291.29 is: 402.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.79 : 630.75 = 291.29 : x
  2. Step 2: Convert to fraction form
    456.79/630.75 = 291.29/x
  3. Step 3: Cross multiply
    456.79x = 630.75 × 291.29
  4. Step 4: Simplify right side
    456.79x = 183,731.17
  5. Step 5: Solve for x
    x = 183,731.17/456.79
  6. Step 6: Final answer
    x = 402.22

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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.