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Finding the Fourth Proportional to 962.61, 1,327.77 and 631.32

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Solution

The fourth proportional to 962.61, 1,327.77 and 631.32 is: 870.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.61 : 1,327.77 = 631.32 : x
  2. Step 2: Convert to fraction form
    962.61/1,327.77 = 631.32/x
  3. Step 3: Cross multiply
    962.61x = 1,327.77 × 631.32
  4. Step 4: Simplify right side
    962.61x = 838,247.76
  5. Step 5: Solve for x
    x = 838,247.76/962.61
  6. Step 6: Final answer
    x = 870.81

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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.