Home / 2,572.42-3,864.78-1,649.78

Finding the Fourth Proportional to 2,572.42, 3,864.78 and 1,649.78

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Solution

The fourth proportional to 2,572.42, 3,864.78 and 1,649.78 is: 2,478.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.42 : 3,864.78 = 1,649.78 : x
  2. Step 2: Convert to fraction form
    2,572.42/3,864.78 = 1,649.78/x
  3. Step 3: Cross multiply
    2,572.42x = 3,864.78 × 1,649.78
  4. Step 4: Simplify right side
    2,572.42x = 6,376,017.42
  5. Step 5: Solve for x
    x = 6,376,017.42/2,572.42
  6. Step 6: Final answer
    x = 2,478.61

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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.