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Finding the Fourth Proportional to 487.08, 667.80 and 479.52

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Solution

The fourth proportional to 487.08, 667.80 and 479.52 is: 657.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.08 : 667.80 = 479.52 : x
  2. Step 2: Convert to fraction form
    487.08/667.80 = 479.52/x
  3. Step 3: Cross multiply
    487.08x = 667.80 × 479.52
  4. Step 4: Simplify right side
    487.08x = 320,223.46
  5. Step 5: Solve for x
    x = 320,223.46/487.08
  6. Step 6: Final answer
    x = 657.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.