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Finding the Fourth Proportional to 672.52, 1,009.20 and 384.16

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Solution

The fourth proportional to 672.52, 1,009.20 and 384.16 is: 576.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.52 : 1,009.20 = 384.16 : x
  2. Step 2: Convert to fraction form
    672.52/1,009.20 = 384.16/x
  3. Step 3: Cross multiply
    672.52x = 1,009.20 × 384.16
  4. Step 4: Simplify right side
    672.52x = 387,694.27
  5. Step 5: Solve for x
    x = 387,694.27/672.52
  6. Step 6: Final answer
    x = 576.48

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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.