Home / 1,563.20-2,158.10-1,247.46

Finding the Fourth Proportional to 1,563.20, 2,158.10 and 1,247.46

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Solution

The fourth proportional to 1,563.20, 2,158.10 and 1,247.46 is: 1,722.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.20 : 2,158.10 = 1,247.46 : x
  2. Step 2: Convert to fraction form
    1,563.20/2,158.10 = 1,247.46/x
  3. Step 3: Cross multiply
    1,563.20x = 2,158.10 × 1,247.46
  4. Step 4: Simplify right side
    1,563.20x = 2,692,143.43
  5. Step 5: Solve for x
    x = 2,692,143.43/1,563.20
  6. Step 6: Final answer
    x = 1,722.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.