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Finding the Fourth Proportional to 1,877.72, 2,817.40 and 1,738.40

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Solution

The fourth proportional to 1,877.72, 2,817.40 and 1,738.40 is: 2,608.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.72 : 2,817.40 = 1,738.40 : x
  2. Step 2: Convert to fraction form
    1,877.72/2,817.40 = 1,738.40/x
  3. Step 3: Cross multiply
    1,877.72x = 2,817.40 × 1,738.40
  4. Step 4: Simplify right side
    1,877.72x = 4,897,768.16
  5. Step 5: Solve for x
    x = 4,897,768.16/1,877.72
  6. Step 6: Final answer
    x = 2,608.36

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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.