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Finding the Fourth Proportional to 2,642.77, 3,962.85 and 887.17

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Solution

The fourth proportional to 2,642.77, 3,962.85 and 887.17 is: 1,330.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.77 : 3,962.85 = 887.17 : x
  2. Step 2: Convert to fraction form
    2,642.77/3,962.85 = 887.17/x
  3. Step 3: Cross multiply
    2,642.77x = 3,962.85 × 887.17
  4. Step 4: Simplify right side
    2,642.77x = 3,515,721.63
  5. Step 5: Solve for x
    x = 3,515,721.63/2,642.77
  6. Step 6: Final answer
    x = 1,330.32

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Similar ratio
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1.5x scale

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.