Home / 280,854.20-421,268.34-70,487.48

Finding the Fourth Proportional to 280,854.20, 421,268.34 and 70,487.48

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Solution

The fourth proportional to 280,854.20, 421,268.34 and 70,487.48 is: 105,727.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,854.20 : 421,268.34 = 70,487.48 : x
  2. Step 2: Convert to fraction form
    280,854.20/421,268.34 = 70,487.48/x
  3. Step 3: Cross multiply
    280,854.20x = 421,268.34 × 70,487.48
  4. Step 4: Simplify right side
    280,854.20x = 29,694,143,690.38
  5. Step 5: Solve for x
    x = 29,694,143,690.38/280,854.20
  6. Step 6: Final answer
    x = 105,727.97

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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.