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Finding the Fourth Proportional to 697.66, 961.80 and 487.54

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Solution

The fourth proportional to 697.66, 961.80 and 487.54 is: 672.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.66 : 961.80 = 487.54 : x
  2. Step 2: Convert to fraction form
    697.66/961.80 = 487.54/x
  3. Step 3: Cross multiply
    697.66x = 961.80 × 487.54
  4. Step 4: Simplify right side
    697.66x = 468,915.97
  5. Step 5: Solve for x
    x = 468,915.97/697.66
  6. Step 6: Final answer
    x = 672.13

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1.5x scale

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.