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Finding the Fourth Proportional to 43,398.40, 65,134.48 and 30,948.96

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Solution

The fourth proportional to 43,398.40, 65,134.48 and 30,948.96 is: 46,449.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,398.40 : 65,134.48 = 30,948.96 : x
  2. Step 2: Convert to fraction form
    43,398.40/65,134.48 = 30,948.96/x
  3. Step 3: Cross multiply
    43,398.40x = 65,134.48 × 30,948.96
  4. Step 4: Simplify right side
    43,398.40x = 2,015,844,416.14
  5. Step 5: Solve for x
    x = 2,015,844,416.14/43,398.40
  6. Step 6: Final answer
    x = 46,449.74

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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.