Home / 3,315.65-4,971.92-1,123.79

Finding the Fourth Proportional to 3,315.65, 4,971.92 and 1,123.79

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Solution

The fourth proportional to 3,315.65, 4,971.92 and 1,123.79 is: 1,685.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.65 : 4,971.92 = 1,123.79 : x
  2. Step 2: Convert to fraction form
    3,315.65/4,971.92 = 1,123.79/x
  3. Step 3: Cross multiply
    3,315.65x = 4,971.92 × 1,123.79
  4. Step 4: Simplify right side
    3,315.65x = 5,587,363.50
  5. Step 5: Solve for x
    x = 5,587,363.50/3,315.65
  6. Step 6: Final answer
    x = 1,685.15

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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.