Home / 1,247.95-1,862.43-1,109.55

Finding the Fourth Proportional to 1,247.95, 1,862.43 and 1,109.55

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Solution

The fourth proportional to 1,247.95, 1,862.43 and 1,109.55 is: 1,655.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.95 : 1,862.43 = 1,109.55 : x
  2. Step 2: Convert to fraction form
    1,247.95/1,862.43 = 1,109.55/x
  3. Step 3: Cross multiply
    1,247.95x = 1,862.43 × 1,109.55
  4. Step 4: Simplify right side
    1,247.95x = 2,066,468.27
  5. Step 5: Solve for x
    x = 2,066,468.27/1,247.95
  6. Step 6: Final answer
    x = 1,655.90

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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.