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Finding the Fourth Proportional to 43,520.40, 65,419.80 and 40,438.80

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Solution

The fourth proportional to 43,520.40, 65,419.80 and 40,438.80 is: 60,787.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,520.40 : 65,419.80 = 40,438.80 : x
  2. Step 2: Convert to fraction form
    43,520.40/65,419.80 = 40,438.80/x
  3. Step 3: Cross multiply
    43,520.40x = 65,419.80 × 40,438.80
  4. Step 4: Simplify right side
    43,520.40x = 2,645,498,208.24
  5. Step 5: Solve for x
    x = 2,645,498,208.24/43,520.40
  6. Step 6: Final answer
    x = 60,787.54

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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.