Home / 1,913.29-2,869.94-680.75

Finding the Fourth Proportional to 1,913.29, 2,869.94 and 680.75

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Solution

The fourth proportional to 1,913.29, 2,869.94 and 680.75 is: 1,021.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.29 : 2,869.94 = 680.75 : x
  2. Step 2: Convert to fraction form
    1,913.29/2,869.94 = 680.75/x
  3. Step 3: Cross multiply
    1,913.29x = 2,869.94 × 680.75
  4. Step 4: Simplify right side
    1,913.29x = 1,953,699.01
  5. Step 5: Solve for x
    x = 1,953,699.01/1,913.29
  6. Step 6: Final answer
    x = 1,021.12

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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.