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Finding the Fourth Proportional to 724.65, 999.65 and 458.64

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Solution

The fourth proportional to 724.65, 999.65 and 458.64 is: 632.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.65 : 999.65 = 458.64 : x
  2. Step 2: Convert to fraction form
    724.65/999.65 = 458.64/x
  3. Step 3: Cross multiply
    724.65x = 999.65 × 458.64
  4. Step 4: Simplify right side
    724.65x = 458,477.18
  5. Step 5: Solve for x
    x = 458,477.18/724.65
  6. Step 6: Final answer
    x = 632.69

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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.