Home / 1,279.60-1,917.47-498.79

Finding the Fourth Proportional to 1,279.60, 1,917.47 and 498.79

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Solution

The fourth proportional to 1,279.60, 1,917.47 and 498.79 is: 747.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.60 : 1,917.47 = 498.79 : x
  2. Step 2: Convert to fraction form
    1,279.60/1,917.47 = 498.79/x
  3. Step 3: Cross multiply
    1,279.60x = 1,917.47 × 498.79
  4. Step 4: Simplify right side
    1,279.60x = 956,418.51
  5. Step 5: Solve for x
    x = 956,418.51/1,279.60
  6. Step 6: Final answer
    x = 747.44

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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.