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Finding the Fourth Proportional to 1,519.81, 2,279.85 and 653.92

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Solution

The fourth proportional to 1,519.81, 2,279.85 and 653.92 is: 980.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.81 : 2,279.85 = 653.92 : x
  2. Step 2: Convert to fraction form
    1,519.81/2,279.85 = 653.92/x
  3. Step 3: Cross multiply
    1,519.81x = 2,279.85 × 653.92
  4. Step 4: Simplify right side
    1,519.81x = 1,490,839.51
  5. Step 5: Solve for x
    x = 1,490,839.51/1,519.81
  6. Step 6: Final answer
    x = 980.94

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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.