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Finding the Fourth Proportional to 1,514.68, 2,089.14 and 990.52

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Solution

The fourth proportional to 1,514.68, 2,089.14 and 990.52 is: 1,366.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,514.68 : 2,089.14 = 990.52 : x
  2. Step 2: Convert to fraction form
    1,514.68/2,089.14 = 990.52/x
  3. Step 3: Cross multiply
    1,514.68x = 2,089.14 × 990.52
  4. Step 4: Simplify right side
    1,514.68x = 2,069,334.95
  5. Step 5: Solve for x
    x = 2,069,334.95/1,514.68
  6. Step 6: Final answer
    x = 1,366.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.