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Finding the Fourth Proportional to 2,726.86, 4,089.90 and 877.74

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Solution

The fourth proportional to 2,726.86, 4,089.90 and 877.74 is: 1,316.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,726.86 : 4,089.90 = 877.74 : x
  2. Step 2: Convert to fraction form
    2,726.86/4,089.90 = 877.74/x
  3. Step 3: Cross multiply
    2,726.86x = 4,089.90 × 877.74
  4. Step 4: Simplify right side
    2,726.86x = 3,589,868.83
  5. Step 5: Solve for x
    x = 3,589,868.83/2,726.86
  6. Step 6: Final answer
    x = 1,316.48

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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.