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Finding the Fourth Proportional to 956.68, 1,320.66 and 625.60

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Solution

The fourth proportional to 956.68, 1,320.66 and 625.60 is: 863.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.68 : 1,320.66 = 625.60 : x
  2. Step 2: Convert to fraction form
    956.68/1,320.66 = 625.60/x
  3. Step 3: Cross multiply
    956.68x = 1,320.66 × 625.60
  4. Step 4: Simplify right side
    956.68x = 826,204.90
  5. Step 5: Solve for x
    x = 826,204.90/956.68
  6. Step 6: Final answer
    x = 863.62

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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.