Home / 1,913.10-2,869.71-680.49

Finding the Fourth Proportional to 1,913.10, 2,869.71 and 680.49

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Solution

The fourth proportional to 1,913.10, 2,869.71 and 680.49 is: 1,020.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.10 : 2,869.71 = 680.49 : x
  2. Step 2: Convert to fraction form
    1,913.10/2,869.71 = 680.49/x
  3. Step 3: Cross multiply
    1,913.10x = 2,869.71 × 680.49
  4. Step 4: Simplify right side
    1,913.10x = 1,952,808.96
  5. Step 5: Solve for x
    x = 1,952,808.96/1,913.10
  6. Step 6: Final answer
    x = 1,020.76

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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.