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Finding the Fourth Proportional to 1,240.39, 1,860.87 and 374.71

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Solution

The fourth proportional to 1,240.39, 1,860.87 and 374.71 is: 562.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.39 : 1,860.87 = 374.71 : x
  2. Step 2: Convert to fraction form
    1,240.39/1,860.87 = 374.71/x
  3. Step 3: Cross multiply
    1,240.39x = 1,860.87 × 374.71
  4. Step 4: Simplify right side
    1,240.39x = 697,286.60
  5. Step 5: Solve for x
    x = 697,286.60/1,240.39
  6. Step 6: Final answer
    x = 562.15

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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.