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Finding the Fourth Proportional to 1,451.74, 2,178.46 and 574.32

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Solution

The fourth proportional to 1,451.74, 2,178.46 and 574.32 is: 861.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.74 : 2,178.46 = 574.32 : x
  2. Step 2: Convert to fraction form
    1,451.74/2,178.46 = 574.32/x
  3. Step 3: Cross multiply
    1,451.74x = 2,178.46 × 574.32
  4. Step 4: Simplify right side
    1,451.74x = 1,251,135.02
  5. Step 5: Solve for x
    x = 1,251,135.02/1,451.74
  6. Step 6: Final answer
    x = 861.82

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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.