Home / 1,519.32-2,279.28-545.40

Finding the Fourth Proportional to 1,519.32, 2,279.28 and 545.40

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Solution

The fourth proportional to 1,519.32, 2,279.28 and 545.40 is: 818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.32 : 2,279.28 = 545.40 : x
  2. Step 2: Convert to fraction form
    1,519.32/2,279.28 = 545.40/x
  3. Step 3: Cross multiply
    1,519.32x = 2,279.28 × 545.40
  4. Step 4: Simplify right side
    1,519.32x = 1,243,119.31
  5. Step 5: Solve for x
    x = 1,243,119.31/1,519.32
  6. Step 6: Final answer
    x = 818.21

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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.