Home / 1,279.14-1,919.18-538.93

Finding the Fourth Proportional to 1,279.14, 1,919.18 and 538.93

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Solution

The fourth proportional to 1,279.14, 1,919.18 and 538.93 is: 808.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.14 : 1,919.18 = 538.93 : x
  2. Step 2: Convert to fraction form
    1,279.14/1,919.18 = 538.93/x
  3. Step 3: Cross multiply
    1,279.14x = 1,919.18 × 538.93
  4. Step 4: Simplify right side
    1,279.14x = 1,034,309.79
  5. Step 5: Solve for x
    x = 1,034,309.79/1,279.14
  6. Step 6: Final answer
    x = 808.60

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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.