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Finding the Fourth Proportional to 43,428.80, 64,964.88 and 34,680.80

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Solution

The fourth proportional to 43,428.80, 64,964.88 and 34,680.80 is: 51,878.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,428.80 : 64,964.88 = 34,680.80 : x
  2. Step 2: Convert to fraction form
    43,428.80/64,964.88 = 34,680.80/x
  3. Step 3: Cross multiply
    43,428.80x = 64,964.88 × 34,680.80
  4. Step 4: Simplify right side
    43,428.80x = 2,253,034,010.30
  5. Step 5: Solve for x
    x = 2,253,034,010.30/43,428.80
  6. Step 6: Final answer
    x = 51,878.80

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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.