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Finding the Fourth Proportional to 215,793.20, 323,689.80 and 197,130.80

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Solution

The fourth proportional to 215,793.20, 323,689.80 and 197,130.80 is: 295,696.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,793.20 : 323,689.80 = 197,130.80 : x
  2. Step 2: Convert to fraction form
    215,793.20/323,689.80 = 197,130.80/x
  3. Step 3: Cross multiply
    215,793.20x = 323,689.80 × 197,130.80
  4. Step 4: Simplify right side
    215,793.20x = 63,809,229,225.84
  5. Step 5: Solve for x
    x = 63,809,229,225.84/215,793.20
  6. Step 6: Final answer
    x = 295,696.20

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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.