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Finding the Fourth Proportional to 962.92, 1,328.88 and 631.54

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Solution

The fourth proportional to 962.92, 1,328.88 and 631.54 is: 871.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.92 : 1,328.88 = 631.54 : x
  2. Step 2: Convert to fraction form
    962.92/1,328.88 = 631.54/x
  3. Step 3: Cross multiply
    962.92x = 1,328.88 × 631.54
  4. Step 4: Simplify right side
    962.92x = 839,240.88
  5. Step 5: Solve for x
    x = 839,240.88/962.92
  6. Step 6: Final answer
    x = 871.56

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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.