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Finding the Fourth Proportional to 960.74, 1,325.90 and 567.78

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Solution

The fourth proportional to 960.74, 1,325.90 and 567.78 is: 783.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.74 : 1,325.90 = 567.78 : x
  2. Step 2: Convert to fraction form
    960.74/1,325.90 = 567.78/x
  3. Step 3: Cross multiply
    960.74x = 1,325.90 × 567.78
  4. Step 4: Simplify right side
    960.74x = 752,819.50
  5. Step 5: Solve for x
    x = 752,819.50/960.74
  6. Step 6: Final answer
    x = 783.58

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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.