Home / 1,138.46-1,560.83-1,117.70

Finding the Fourth Proportional to 1,138.46, 1,560.83 and 1,117.70

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Solution

The fourth proportional to 1,138.46, 1,560.83 and 1,117.70 is: 1,532.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.46 : 1,560.83 = 1,117.70 : x
  2. Step 2: Convert to fraction form
    1,138.46/1,560.83 = 1,117.70/x
  3. Step 3: Cross multiply
    1,138.46x = 1,560.83 × 1,117.70
  4. Step 4: Simplify right side
    1,138.46x = 1,744,535.29
  5. Step 5: Solve for x
    x = 1,744,535.29/1,138.46
  6. Step 6: Final answer
    x = 1,532.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.