Home / 312,823.20-469,234.80-212,439.90

Finding the Fourth Proportional to 312,823.20, 469,234.80 and 212,439.90

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Solution

The fourth proportional to 312,823.20, 469,234.80 and 212,439.90 is: 318,659.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,823.20 : 469,234.80 = 212,439.90 : x
  2. Step 2: Convert to fraction form
    312,823.20/469,234.80 = 212,439.90/x
  3. Step 3: Cross multiply
    312,823.20x = 469,234.80 × 212,439.90
  4. Step 4: Simplify right side
    312,823.20x = 99,684,193,988.52
  5. Step 5: Solve for x
    x = 99,684,193,988.52/312,823.20
  6. Step 6: Final answer
    x = 318,659.85

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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.