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Finding the Fourth Proportional to 962.68, 1,328.94 and 631.12

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Solution

The fourth proportional to 962.68, 1,328.94 and 631.12 is: 871.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.68 : 1,328.94 = 631.12 : x
  2. Step 2: Convert to fraction form
    962.68/1,328.94 = 631.12/x
  3. Step 3: Cross multiply
    962.68x = 1,328.94 × 631.12
  4. Step 4: Simplify right side
    962.68x = 838,720.61
  5. Step 5: Solve for x
    x = 838,720.61/962.68
  6. Step 6: Final answer
    x = 871.24

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1.5x scale

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.