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Finding the Fourth Proportional to 672.48, 1,008.08 and 348.32

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Solution

The fourth proportional to 672.48, 1,008.08 and 348.32 is: 522.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.48 : 1,008.08 = 348.32 : x
  2. Step 2: Convert to fraction form
    672.48/1,008.08 = 348.32/x
  3. Step 3: Cross multiply
    672.48x = 1,008.08 × 348.32
  4. Step 4: Simplify right side
    672.48x = 351,134.43
  5. Step 5: Solve for x
    x = 351,134.43/672.48
  6. Step 6: Final answer
    x = 522.15

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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.