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Finding the Fourth Proportional to 487.29, 672.66 and 347.43

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Solution

The fourth proportional to 487.29, 672.66 and 347.43 is: 479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.29 : 672.66 = 347.43 : x
  2. Step 2: Convert to fraction form
    487.29/672.66 = 347.43/x
  3. Step 3: Cross multiply
    487.29x = 672.66 × 347.43
  4. Step 4: Simplify right side
    487.29x = 233,702.26
  5. Step 5: Solve for x
    x = 233,702.26/487.29
  6. Step 6: Final answer
    x = 479.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.