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Finding the Fourth Proportional to 312,124.20, 468,348.30 and 145,912.20

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Solution

The fourth proportional to 312,124.20, 468,348.30 and 145,912.20 is: 218,944.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,124.20 : 468,348.30 = 145,912.20 : x
  2. Step 2: Convert to fraction form
    312,124.20/468,348.30 = 145,912.20/x
  3. Step 3: Cross multiply
    312,124.20x = 468,348.30 × 145,912.20
  4. Step 4: Simplify right side
    312,124.20x = 68,337,730,819.26
  5. Step 5: Solve for x
    x = 68,337,730,819.26/312,124.20
  6. Step 6: Final answer
    x = 218,944.03

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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.