Home / 4,258.86-6,387.78-1,139.10

Finding the Fourth Proportional to 4,258.86, 6,387.78 and 1,139.10

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Solution

The fourth proportional to 4,258.86, 6,387.78 and 1,139.10 is: 1,708.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,258.86 : 6,387.78 = 1,139.10 : x
  2. Step 2: Convert to fraction form
    4,258.86/6,387.78 = 1,139.10/x
  3. Step 3: Cross multiply
    4,258.86x = 6,387.78 × 1,139.10
  4. Step 4: Simplify right side
    4,258.86x = 7,276,320.20
  5. Step 5: Solve for x
    x = 7,276,320.20/4,258.86
  6. Step 6: Final answer
    x = 1,708.51

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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.