Home / 1,409.11-2,115.02-1,042.78

Finding the Fourth Proportional to 1,409.11, 2,115.02 and 1,042.78

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Solution

The fourth proportional to 1,409.11, 2,115.02 and 1,042.78 is: 1,565.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.11 : 2,115.02 = 1,042.78 : x
  2. Step 2: Convert to fraction form
    1,409.11/2,115.02 = 1,042.78/x
  3. Step 3: Cross multiply
    1,409.11x = 2,115.02 × 1,042.78
  4. Step 4: Simplify right side
    1,409.11x = 2,205,500.56
  5. Step 5: Solve for x
    x = 2,205,500.56/1,409.11
  6. Step 6: Final answer
    x = 1,565.17

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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.