Home / 1,279.52-1,919.40-457.76

Finding the Fourth Proportional to 1,279.52, 1,919.40 and 457.76

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Solution

The fourth proportional to 1,279.52, 1,919.40 and 457.76 is: 686.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.52 : 1,919.40 = 457.76 : x
  2. Step 2: Convert to fraction form
    1,279.52/1,919.40 = 457.76/x
  3. Step 3: Cross multiply
    1,279.52x = 1,919.40 × 457.76
  4. Step 4: Simplify right side
    1,279.52x = 878,624.54
  5. Step 5: Solve for x
    x = 878,624.54/1,279.52
  6. Step 6: Final answer
    x = 686.68

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1.5x scale

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.