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Finding the Fourth Proportional to 964.68, 1,331.70 and 633.12

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Solution

The fourth proportional to 964.68, 1,331.70 and 633.12 is: 874.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.68 : 1,331.70 = 633.12 : x
  2. Step 2: Convert to fraction form
    964.68/1,331.70 = 633.12/x
  3. Step 3: Cross multiply
    964.68x = 1,331.70 × 633.12
  4. Step 4: Simplify right side
    964.68x = 843,125.90
  5. Step 5: Solve for x
    x = 843,125.90/964.68
  6. Step 6: Final answer
    x = 874.00

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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.