Home / 1,518.50-2,278.87-1,172.70

Finding the Fourth Proportional to 1,518.50, 2,278.87 and 1,172.70

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Solution

The fourth proportional to 1,518.50, 2,278.87 and 1,172.70 is: 1,759.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.50 : 2,278.87 = 1,172.70 : x
  2. Step 2: Convert to fraction form
    1,518.50/2,278.87 = 1,172.70/x
  3. Step 3: Cross multiply
    1,518.50x = 2,278.87 × 1,172.70
  4. Step 4: Simplify right side
    1,518.50x = 2,672,427.92
  5. Step 5: Solve for x
    x = 2,672,427.92/1,518.50
  6. Step 6: Final answer
    x = 1,759.91

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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.