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Finding the Fourth Proportional to 1,240.14, 1,859.85 and 499.75

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Solution

The fourth proportional to 1,240.14, 1,859.85 and 499.75 is: 749.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.14 : 1,859.85 = 499.75 : x
  2. Step 2: Convert to fraction form
    1,240.14/1,859.85 = 499.75/x
  3. Step 3: Cross multiply
    1,240.14x = 1,859.85 × 499.75
  4. Step 4: Simplify right side
    1,240.14x = 929,460.04
  5. Step 5: Solve for x
    x = 929,460.04/1,240.14
  6. Step 6: Final answer
    x = 749.48

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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.