Home / 3,139.56-4,332.60-1,742.40

Finding the Fourth Proportional to 3,139.56, 4,332.60 and 1,742.40

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Solution

The fourth proportional to 3,139.56, 4,332.60 and 1,742.40 is: 2,404.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.56 : 4,332.60 = 1,742.40 : x
  2. Step 2: Convert to fraction form
    3,139.56/4,332.60 = 1,742.40/x
  3. Step 3: Cross multiply
    3,139.56x = 4,332.60 × 1,742.40
  4. Step 4: Simplify right side
    3,139.56x = 7,549,122.24
  5. Step 5: Solve for x
    x = 7,549,122.24/3,139.56
  6. Step 6: Final answer
    x = 2,404.52

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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.