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Finding the Fourth Proportional to 866.34, 1,296.72 and 454.92

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Solution

The fourth proportional to 866.34, 1,296.72 and 454.92 is: 680.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.34 : 1,296.72 = 454.92 : x
  2. Step 2: Convert to fraction form
    866.34/1,296.72 = 454.92/x
  3. Step 3: Cross multiply
    866.34x = 1,296.72 × 454.92
  4. Step 4: Simplify right side
    866.34x = 589,903.86
  5. Step 5: Solve for x
    x = 589,903.86/866.34
  6. Step 6: Final answer
    x = 680.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.