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Finding the Fourth Proportional to 2,876.80, 3,970.56 and 1,697.28

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Solution

The fourth proportional to 2,876.80, 3,970.56 and 1,697.28 is: 2,342.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.80 : 3,970.56 = 1,697.28 : x
  2. Step 2: Convert to fraction form
    2,876.80/3,970.56 = 1,697.28/x
  3. Step 3: Cross multiply
    2,876.80x = 3,970.56 × 1,697.28
  4. Step 4: Simplify right side
    2,876.80x = 6,739,152.08
  5. Step 5: Solve for x
    x = 6,739,152.08/2,876.80
  6. Step 6: Final answer
    x = 2,342.59

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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.