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Finding the Fourth Proportional to 832.08, 1,248.52 and 399.12

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Solution

The fourth proportional to 832.08, 1,248.52 and 399.12 is: 598.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.08 : 1,248.52 = 399.12 : x
  2. Step 2: Convert to fraction form
    832.08/1,248.52 = 399.12/x
  3. Step 3: Cross multiply
    832.08x = 1,248.52 × 399.12
  4. Step 4: Simplify right side
    832.08x = 498,309.30
  5. Step 5: Solve for x
    x = 498,309.30/832.08
  6. Step 6: Final answer
    x = 598.87

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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.