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Finding the Fourth Proportional to 956.82, 1,320.39 and 563.85

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Solution

The fourth proportional to 956.82, 1,320.39 and 563.85 is: 778.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.82 : 1,320.39 = 563.85 : x
  2. Step 2: Convert to fraction form
    956.82/1,320.39 = 563.85/x
  3. Step 3: Cross multiply
    956.82x = 1,320.39 × 563.85
  4. Step 4: Simplify right side
    956.82x = 744,501.90
  5. Step 5: Solve for x
    x = 744,501.90/956.82
  6. Step 6: Final answer
    x = 778.10

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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.