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Finding the Fourth Proportional to 697.34, 962.75 and 487.15

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Solution

The fourth proportional to 697.34, 962.75 and 487.15 is: 672.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.34 : 962.75 = 487.15 : x
  2. Step 2: Convert to fraction form
    697.34/962.75 = 487.15/x
  3. Step 3: Cross multiply
    697.34x = 962.75 × 487.15
  4. Step 4: Simplify right side
    697.34x = 469,002.47
  5. Step 5: Solve for x
    x = 469,002.47/697.34
  6. Step 6: Final answer
    x = 672.56

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Half scale
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Double scale
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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.