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Finding the Fourth Proportional to 2,886.96, 3,985.20 and 2,591.76

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Solution

The fourth proportional to 2,886.96, 3,985.20 and 2,591.76 is: 3,577.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.96 : 3,985.20 = 2,591.76 : x
  2. Step 2: Convert to fraction form
    2,886.96/3,985.20 = 2,591.76/x
  3. Step 3: Cross multiply
    2,886.96x = 3,985.20 × 2,591.76
  4. Step 4: Simplify right side
    2,886.96x = 10,328,681.95
  5. Step 5: Solve for x
    x = 10,328,681.95/2,886.96
  6. Step 6: Final answer
    x = 3,577.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.