Home / 2,726.40-4,089.11-778.13

Finding the Fourth Proportional to 2,726.40, 4,089.11 and 778.13

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Solution

The fourth proportional to 2,726.40, 4,089.11 and 778.13 is: 1,167.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,726.40 : 4,089.11 = 778.13 : x
  2. Step 2: Convert to fraction form
    2,726.40/4,089.11 = 778.13/x
  3. Step 3: Cross multiply
    2,726.40x = 4,089.11 × 778.13
  4. Step 4: Simplify right side
    2,726.40x = 3,181,834.83
  5. Step 5: Solve for x
    x = 3,181,834.83/2,726.40
  6. Step 6: Final answer
    x = 1,167.05

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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.