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Finding the Fourth Proportional to 697.62, 962.92 and 687.10

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Solution

The fourth proportional to 697.62, 962.92 and 687.10 is: 948.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.62 : 962.92 = 687.10 : x
  2. Step 2: Convert to fraction form
    697.62/962.92 = 687.10/x
  3. Step 3: Cross multiply
    697.62x = 962.92 × 687.10
  4. Step 4: Simplify right side
    697.62x = 661,622.33
  5. Step 5: Solve for x
    x = 661,622.33/697.62
  6. Step 6: Final answer
    x = 948.40

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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.