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Finding the Fourth Proportional to 964.77, 1,331.69 and 610.80

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Solution

The fourth proportional to 964.77, 1,331.69 and 610.80 is: 843.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.77 : 1,331.69 = 610.80 : x
  2. Step 2: Convert to fraction form
    964.77/1,331.69 = 610.80/x
  3. Step 3: Cross multiply
    964.77x = 1,331.69 × 610.80
  4. Step 4: Simplify right side
    964.77x = 813,393.20
  5. Step 5: Solve for x
    x = 813,393.20/964.77
  6. Step 6: Final answer
    x = 843.10

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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.