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Finding the Fourth Proportional to 2,959.80, 4,428.90 and 2,700.60

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Solution

The fourth proportional to 2,959.80, 4,428.90 and 2,700.60 is: 4,041.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,959.80 : 4,428.90 = 2,700.60 : x
  2. Step 2: Convert to fraction form
    2,959.80/4,428.90 = 2,700.60/x
  3. Step 3: Cross multiply
    2,959.80x = 4,428.90 × 2,700.60
  4. Step 4: Simplify right side
    2,959.80x = 11,960,687.34
  5. Step 5: Solve for x
    x = 11,960,687.34/2,959.80
  6. Step 6: Final answer
    x = 4,041.05

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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.