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Finding the Fourth Proportional to 1,765.13, 2,647.85 and 887.18

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Solution

The fourth proportional to 1,765.13, 2,647.85 and 887.18 is: 1,330.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.13 : 2,647.85 = 887.18 : x
  2. Step 2: Convert to fraction form
    1,765.13/2,647.85 = 887.18/x
  3. Step 3: Cross multiply
    1,765.13x = 2,647.85 × 887.18
  4. Step 4: Simplify right side
    1,765.13x = 2,349,121.75
  5. Step 5: Solve for x
    x = 2,349,121.75/1,765.13
  6. Step 6: Final answer
    x = 1,330.85

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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.