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Finding the Fourth Proportional to 1,877.90, 2,817.74 and 723.38

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Solution

The fourth proportional to 1,877.90, 2,817.74 and 723.38 is: 1,085.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.90 : 2,817.74 = 723.38 : x
  2. Step 2: Convert to fraction form
    1,877.90/2,817.74 = 723.38/x
  3. Step 3: Cross multiply
    1,877.90x = 2,817.74 × 723.38
  4. Step 4: Simplify right side
    1,877.90x = 2,038,284.48
  5. Step 5: Solve for x
    x = 2,038,284.48/1,877.90
  6. Step 6: Final answer
    x = 1,085.41

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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.