Home / 2,289.80-3,434.70-1,315.10

Finding the Fourth Proportional to 2,289.80, 3,434.70 and 1,315.10

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Solution

The fourth proportional to 2,289.80, 3,434.70 and 1,315.10 is: 1,972.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.80 : 3,434.70 = 1,315.10 : x
  2. Step 2: Convert to fraction form
    2,289.80/3,434.70 = 1,315.10/x
  3. Step 3: Cross multiply
    2,289.80x = 3,434.70 × 1,315.10
  4. Step 4: Simplify right side
    2,289.80x = 4,516,973.97
  5. Step 5: Solve for x
    x = 4,516,973.97/2,289.80
  6. Step 6: Final answer
    x = 1,972.65

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Similar ratio
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1.5x scale

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.