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Finding the Fourth Proportional to 697.80, 962.98 and 387.30

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Solution

The fourth proportional to 697.80, 962.98 and 387.30 is: 534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.80 : 962.98 = 387.30 : x
  2. Step 2: Convert to fraction form
    697.80/962.98 = 387.30/x
  3. Step 3: Cross multiply
    697.80x = 962.98 × 387.30
  4. Step 4: Simplify right side
    697.80x = 372,962.15
  5. Step 5: Solve for x
    x = 372,962.15/697.80
  6. Step 6: Final answer
    x = 534.48

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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.