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Finding the Fourth Proportional to 964.85, 1,331.49 and 522.76

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Solution

The fourth proportional to 964.85, 1,331.49 and 522.76 is: 721.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.85 : 1,331.49 = 522.76 : x
  2. Step 2: Convert to fraction form
    964.85/1,331.49 = 522.76/x
  3. Step 3: Cross multiply
    964.85x = 1,331.49 × 522.76
  4. Step 4: Simplify right side
    964.85x = 696,046.38
  5. Step 5: Solve for x
    x = 696,046.38/964.85
  6. Step 6: Final answer
    x = 721.40

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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.