Home / 1,729.54-2,387.51-1,139.05

Finding the Fourth Proportional to 1,729.54, 2,387.51 and 1,139.05

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Solution

The fourth proportional to 1,729.54, 2,387.51 and 1,139.05 is: 1,572.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.54 : 2,387.51 = 1,139.05 : x
  2. Step 2: Convert to fraction form
    1,729.54/2,387.51 = 1,139.05/x
  3. Step 3: Cross multiply
    1,729.54x = 2,387.51 × 1,139.05
  4. Step 4: Simplify right side
    1,729.54x = 2,719,493.27
  5. Step 5: Solve for x
    x = 2,719,493.27/1,729.54
  6. Step 6: Final answer
    x = 1,572.38

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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.