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Finding the Fourth Proportional to 1,374.75, 2,061.72 and 400.62

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Solution

The fourth proportional to 1,374.75, 2,061.72 and 400.62 is: 600.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.75 : 2,061.72 = 400.62 : x
  2. Step 2: Convert to fraction form
    1,374.75/2,061.72 = 400.62/x
  3. Step 3: Cross multiply
    1,374.75x = 2,061.72 × 400.62
  4. Step 4: Simplify right side
    1,374.75x = 825,966.27
  5. Step 5: Solve for x
    x = 825,966.27/1,374.75
  6. Step 6: Final answer
    x = 600.81

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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.