Home / 1,563.20-2,156.32-1,115.17

Finding the Fourth Proportional to 1,563.20, 2,156.32 and 1,115.17

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Solution

The fourth proportional to 1,563.20, 2,156.32 and 1,115.17 is: 1,538.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.20 : 2,156.32 = 1,115.17 : x
  2. Step 2: Convert to fraction form
    1,563.20/2,156.32 = 1,115.17/x
  3. Step 3: Cross multiply
    1,563.20x = 2,156.32 × 1,115.17
  4. Step 4: Simplify right side
    1,563.20x = 2,404,659.38
  5. Step 5: Solve for x
    x = 2,404,659.38/1,563.20
  6. Step 6: Final answer
    x = 1,538.29

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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.