Home / 1,863.40-2,795.70-1,247.80

Finding the Fourth Proportional to 1,863.40, 2,795.70 and 1,247.80

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Solution

The fourth proportional to 1,863.40, 2,795.70 and 1,247.80 is: 1,872.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.40 : 2,795.70 = 1,247.80 : x
  2. Step 2: Convert to fraction form
    1,863.40/2,795.70 = 1,247.80/x
  3. Step 3: Cross multiply
    1,863.40x = 2,795.70 × 1,247.80
  4. Step 4: Simplify right side
    1,863.40x = 3,488,474.46
  5. Step 5: Solve for x
    x = 3,488,474.46/1,863.40
  6. Step 6: Final answer
    x = 1,872.10

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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.