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Finding the Fourth Proportional to 1,519.71, 2,279.38 and 653.91

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Solution

The fourth proportional to 1,519.71, 2,279.38 and 653.91 is: 980.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.71 : 2,279.38 = 653.91 : x
  2. Step 2: Convert to fraction form
    1,519.71/2,279.38 = 653.91/x
  3. Step 3: Cross multiply
    1,519.71x = 2,279.38 × 653.91
  4. Step 4: Simplify right side
    1,519.71x = 1,490,509.38
  5. Step 5: Solve for x
    x = 1,490,509.38/1,519.71
  6. Step 6: Final answer
    x = 980.79

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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.