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Finding the Fourth Proportional to 1,240.69, 1,860.97 and 471.13

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Solution

The fourth proportional to 1,240.69, 1,860.97 and 471.13 is: 706.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.69 : 1,860.97 = 471.13 : x
  2. Step 2: Convert to fraction form
    1,240.69/1,860.97 = 471.13/x
  3. Step 3: Cross multiply
    1,240.69x = 1,860.97 × 471.13
  4. Step 4: Simplify right side
    1,240.69x = 876,748.31
  5. Step 5: Solve for x
    x = 876,748.31/1,240.69
  6. Step 6: Final answer
    x = 706.66

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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.