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Finding the Fourth Proportional to 1,240.64, 1,859.96 and 849.68

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Solution

The fourth proportional to 1,240.64, 1,859.96 and 849.68 is: 1,273.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.64 : 1,859.96 = 849.68 : x
  2. Step 2: Convert to fraction form
    1,240.64/1,859.96 = 849.68/x
  3. Step 3: Cross multiply
    1,240.64x = 1,859.96 × 849.68
  4. Step 4: Simplify right side
    1,240.64x = 1,580,370.81
  5. Step 5: Solve for x
    x = 1,580,370.81/1,240.64
  6. Step 6: Final answer
    x = 1,273.84

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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.