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Finding the Fourth Proportional to 697.38, 962.29 and 386.90

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Solution

The fourth proportional to 697.38, 962.29 and 386.90 is: 533.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.38 : 962.29 = 386.90 : x
  2. Step 2: Convert to fraction form
    697.38/962.29 = 386.90/x
  3. Step 3: Cross multiply
    697.38x = 962.29 × 386.90
  4. Step 4: Simplify right side
    697.38x = 372,310.00
  5. Step 5: Solve for x
    x = 372,310.00/697.38
  6. Step 6: Final answer
    x = 533.87

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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.