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Finding the Fourth Proportional to 862.64, 1,292.94 and 374.66

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Solution

The fourth proportional to 862.64, 1,292.94 and 374.66 is: 561.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.64 : 1,292.94 = 374.66 : x
  2. Step 2: Convert to fraction form
    862.64/1,292.94 = 374.66/x
  3. Step 3: Cross multiply
    862.64x = 1,292.94 × 374.66
  4. Step 4: Simplify right side
    862.64x = 484,412.90
  5. Step 5: Solve for x
    x = 484,412.90/862.64
  6. Step 6: Final answer
    x = 561.55

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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.