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Finding the Fourth Proportional to 2,713.90, 4,070.76 and 1,152.90

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Solution

The fourth proportional to 2,713.90, 4,070.76 and 1,152.90 is: 1,729.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,713.90 : 4,070.76 = 1,152.90 : x
  2. Step 2: Convert to fraction form
    2,713.90/4,070.76 = 1,152.90/x
  3. Step 3: Cross multiply
    2,713.90x = 4,070.76 × 1,152.90
  4. Step 4: Simplify right side
    2,713.90x = 4,693,179.20
  5. Step 5: Solve for x
    x = 4,693,179.20/2,713.90
  6. Step 6: Final answer
    x = 1,729.31

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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.