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Finding the Fourth Proportional to 457.12, 630.64 and 291.04

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Solution

The fourth proportional to 457.12, 630.64 and 291.04 is: 401.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.12 : 630.64 = 291.04 : x
  2. Step 2: Convert to fraction form
    457.12/630.64 = 291.04/x
  3. Step 3: Cross multiply
    457.12x = 630.64 × 291.04
  4. Step 4: Simplify right side
    457.12x = 183,541.47
  5. Step 5: Solve for x
    x = 183,541.47/457.12
  6. Step 6: Final answer
    x = 401.52

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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.