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Finding the Fourth Proportional to 43,909.20, 65,863.80 and 40,280.40

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Solution

The fourth proportional to 43,909.20, 65,863.80 and 40,280.40 is: 60,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,909.20 : 65,863.80 = 40,280.40 : x
  2. Step 2: Convert to fraction form
    43,909.20/65,863.80 = 40,280.40/x
  3. Step 3: Cross multiply
    43,909.20x = 65,863.80 × 40,280.40
  4. Step 4: Simplify right side
    43,909.20x = 2,653,020,209.52
  5. Step 5: Solve for x
    x = 2,653,020,209.52/43,909.20
  6. Step 6: Final answer
    x = 60,420.60

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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.