Home / 1,395.11-2,091.85-615.08

Finding the Fourth Proportional to 1,395.11, 2,091.85 and 615.08

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Solution

The fourth proportional to 1,395.11, 2,091.85 and 615.08 is: 922.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.11 : 2,091.85 = 615.08 : x
  2. Step 2: Convert to fraction form
    1,395.11/2,091.85 = 615.08/x
  3. Step 3: Cross multiply
    1,395.11x = 2,091.85 × 615.08
  4. Step 4: Simplify right side
    1,395.11x = 1,286,655.10
  5. Step 5: Solve for x
    x = 1,286,655.10/1,395.11
  6. Step 6: Final answer
    x = 922.26

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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.