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Finding the Fourth Proportional to 672.57, 1,009.14 and 348.16

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Solution

The fourth proportional to 672.57, 1,009.14 and 348.16 is: 522.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.57 : 1,009.14 = 348.16 : x
  2. Step 2: Convert to fraction form
    672.57/1,009.14 = 348.16/x
  3. Step 3: Cross multiply
    672.57x = 1,009.14 × 348.16
  4. Step 4: Simplify right side
    672.57x = 351,342.18
  5. Step 5: Solve for x
    x = 351,342.18/672.57
  6. Step 6: Final answer
    x = 522.39

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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.