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Finding the Fourth Proportional to 1,853.77, 2,778.72 and 878.71

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Solution

The fourth proportional to 1,853.77, 2,778.72 and 878.71 is: 1,317.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.77 : 2,778.72 = 878.71 : x
  2. Step 2: Convert to fraction form
    1,853.77/2,778.72 = 878.71/x
  3. Step 3: Cross multiply
    1,853.77x = 2,778.72 × 878.71
  4. Step 4: Simplify right side
    1,853.77x = 2,441,689.05
  5. Step 5: Solve for x
    x = 2,441,689.05/1,853.77
  6. Step 6: Final answer
    x = 1,317.15

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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.