Home / 353,379.20-486,432.16-307,979.13

Finding the Fourth Proportional to 353,379.20, 486,432.16 and 307,979.13

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Solution

The fourth proportional to 353,379.20, 486,432.16 and 307,979.13 is: 423,938.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,379.20 : 486,432.16 = 307,979.13 : x
  2. Step 2: Convert to fraction form
    353,379.20/486,432.16 = 307,979.13/x
  3. Step 3: Cross multiply
    353,379.20x = 486,432.16 × 307,979.13
  4. Step 4: Simplify right side
    353,379.20x = 149,810,951,900.93
  5. Step 5: Solve for x
    x = 149,810,951,900.93/353,379.20
  6. Step 6: Final answer
    x = 423,938.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.