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Finding the Fourth Proportional to 956.15, 1,432.20 and 628.10

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Solution

The fourth proportional to 956.15, 1,432.20 and 628.10 is: 940.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.15 : 1,432.20 = 628.10 : x
  2. Step 2: Convert to fraction form
    956.15/1,432.20 = 628.10/x
  3. Step 3: Cross multiply
    956.15x = 1,432.20 × 628.10
  4. Step 4: Simplify right side
    956.15x = 899,564.82
  5. Step 5: Solve for x
    x = 899,564.82/956.15
  6. Step 6: Final answer
    x = 940.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.