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Finding the Fourth Proportional to 1,877.52, 2,591 and 1,091.80

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Solution

The fourth proportional to 1,877.52, 2,591 and 1,091.80 is: 1,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.52 : 2,591 = 1,091.80 : x
  2. Step 2: Convert to fraction form
    1,877.52/2,591 = 1,091.80/x
  3. Step 3: Cross multiply
    1,877.52x = 2,591 × 1,091.80
  4. Step 4: Simplify right side
    1,877.52x = 2,828,853.80
  5. Step 5: Solve for x
    x = 2,828,853.80/1,877.52
  6. Step 6: Final answer
    x = 1,506.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.