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Finding the Fourth Proportional to 3,139.62, 4,332.88 and 1,742.38

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Solution

The fourth proportional to 3,139.62, 4,332.88 and 1,742.38 is: 2,404.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.62 : 4,332.88 = 1,742.38 : x
  2. Step 2: Convert to fraction form
    3,139.62/4,332.88 = 1,742.38/x
  3. Step 3: Cross multiply
    3,139.62x = 4,332.88 × 1,742.38
  4. Step 4: Simplify right side
    3,139.62x = 7,549,523.45
  5. Step 5: Solve for x
    x = 7,549,523.45/3,139.62
  6. Step 6: Final answer
    x = 2,404.60

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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.