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Finding the Fourth Proportional to 3,346.40, 5,019.92 and 1,398.40

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Solution

The fourth proportional to 3,346.40, 5,019.92 and 1,398.40 is: 2,097.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,346.40 : 5,019.92 = 1,398.40 : x
  2. Step 2: Convert to fraction form
    3,346.40/5,019.92 = 1,398.40/x
  3. Step 3: Cross multiply
    3,346.40x = 5,019.92 × 1,398.40
  4. Step 4: Simplify right side
    3,346.40x = 7,019,856.13
  5. Step 5: Solve for x
    x = 7,019,856.13/3,346.40
  6. Step 6: Final answer
    x = 2,097.73

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1.5x scale

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.