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Finding the Fourth Proportional to 456.13, 629.42 and 259.64

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Solution

The fourth proportional to 456.13, 629.42 and 259.64 is: 358.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.13 : 629.42 = 259.64 : x
  2. Step 2: Convert to fraction form
    456.13/629.42 = 259.64/x
  3. Step 3: Cross multiply
    456.13x = 629.42 × 259.64
  4. Step 4: Simplify right side
    456.13x = 163,422.61
  5. Step 5: Solve for x
    x = 163,422.61/456.13
  6. Step 6: Final answer
    x = 358.28

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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.