Home / 1,279.91-1,918.35-498.98

Finding the Fourth Proportional to 1,279.91, 1,918.35 and 498.98

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Solution

The fourth proportional to 1,279.91, 1,918.35 and 498.98 is: 747.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.91 : 1,918.35 = 498.98 : x
  2. Step 2: Convert to fraction form
    1,279.91/1,918.35 = 498.98/x
  3. Step 3: Cross multiply
    1,279.91x = 1,918.35 × 498.98
  4. Step 4: Simplify right side
    1,279.91x = 957,223.08
  5. Step 5: Solve for x
    x = 957,223.08/1,279.91
  6. Step 6: Final answer
    x = 747.88

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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.