Home / 1,913.11-2,869.56-680.34

Finding the Fourth Proportional to 1,913.11, 2,869.56 and 680.34

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Solution

The fourth proportional to 1,913.11, 2,869.56 and 680.34 is: 1,020.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.11 : 2,869.56 = 680.34 : x
  2. Step 2: Convert to fraction form
    1,913.11/2,869.56 = 680.34/x
  3. Step 3: Cross multiply
    1,913.11x = 2,869.56 × 680.34
  4. Step 4: Simplify right side
    1,913.11x = 1,952,276.45
  5. Step 5: Solve for x
    x = 1,952,276.45/1,913.11
  6. Step 6: Final answer
    x = 1,020.47

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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.