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Finding the Fourth Proportional to 1,852.88, 2,776.92 and 1,387

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Solution

The fourth proportional to 1,852.88, 2,776.92 and 1,387 is: 2,078.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,852.88 : 2,776.92 = 1,387 : x
  2. Step 2: Convert to fraction form
    1,852.88/2,776.92 = 1,387/x
  3. Step 3: Cross multiply
    1,852.88x = 2,776.92 × 1,387
  4. Step 4: Simplify right side
    1,852.88x = 3,851,588.04
  5. Step 5: Solve for x
    x = 3,851,588.04/1,852.88
  6. Step 6: Final answer
    x = 2,078.70

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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.