Home / 1,418.52-2,129.18-931.92

Finding the Fourth Proportional to 1,418.52, 2,129.18 and 931.92

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Solution

The fourth proportional to 1,418.52, 2,129.18 and 931.92 is: 1,398.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.52 : 2,129.18 = 931.92 : x
  2. Step 2: Convert to fraction form
    1,418.52/2,129.18 = 931.92/x
  3. Step 3: Cross multiply
    1,418.52x = 2,129.18 × 931.92
  4. Step 4: Simplify right side
    1,418.52x = 1,984,220.77
  5. Step 5: Solve for x
    x = 1,984,220.77/1,418.52
  6. Step 6: Final answer
    x = 1,398.80

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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.