Home / 2,770.77-4,156.40-921.90

Finding the Fourth Proportional to 2,770.77, 4,156.40 and 921.90

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Solution

The fourth proportional to 2,770.77, 4,156.40 and 921.90 is: 1,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.77 : 4,156.40 = 921.90 : x
  2. Step 2: Convert to fraction form
    2,770.77/4,156.40 = 921.90/x
  3. Step 3: Cross multiply
    2,770.77x = 4,156.40 × 921.90
  4. Step 4: Simplify right side
    2,770.77x = 3,831,780.55
  5. Step 5: Solve for x
    x = 3,831,780.55/2,770.77
  6. Step 6: Final answer
    x = 1,382.93

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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.