Home / 1,245.17-1,856.30-1,186.85

Finding the Fourth Proportional to 1,245.17, 1,856.30 and 1,186.85

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Solution

The fourth proportional to 1,245.17, 1,856.30 and 1,186.85 is: 1,769.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.17 : 1,856.30 = 1,186.85 : x
  2. Step 2: Convert to fraction form
    1,245.17/1,856.30 = 1,186.85/x
  3. Step 3: Cross multiply
    1,245.17x = 1,856.30 × 1,186.85
  4. Step 4: Simplify right side
    1,245.17x = 2,203,148.36
  5. Step 5: Solve for x
    x = 2,203,148.36/1,245.17
  6. Step 6: Final answer
    x = 1,769.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.