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Finding the Fourth Proportional to 964.52, 1,331.80 and 890.81

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Solution

The fourth proportional to 964.52, 1,331.80 and 890.81 is: 1,230.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.52 : 1,331.80 = 890.81 : x
  2. Step 2: Convert to fraction form
    964.52/1,331.80 = 890.81/x
  3. Step 3: Cross multiply
    964.52x = 1,331.80 × 890.81
  4. Step 4: Simplify right side
    964.52x = 1,186,374.10
  5. Step 5: Solve for x
    x = 1,186,374.10/964.52
  6. Step 6: Final answer
    x = 1,230.02

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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.