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Finding the Fourth Proportional to 709.92, 1,064.88 and 325.08

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Solution

The fourth proportional to 709.92, 1,064.88 and 325.08 is: 487.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.92 : 1,064.88 = 325.08 : x
  2. Step 2: Convert to fraction form
    709.92/1,064.88 = 325.08/x
  3. Step 3: Cross multiply
    709.92x = 1,064.88 × 325.08
  4. Step 4: Simplify right side
    709.92x = 346,171.19
  5. Step 5: Solve for x
    x = 346,171.19/709.92
  6. Step 6: Final answer
    x = 487.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.