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Finding the Fourth Proportional to 288,911.20, 433,366.80 and 131,447.20

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Solution

The fourth proportional to 288,911.20, 433,366.80 and 131,447.20 is: 197,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,911.20 : 433,366.80 = 131,447.20 : x
  2. Step 2: Convert to fraction form
    288,911.20/433,366.80 = 131,447.20/x
  3. Step 3: Cross multiply
    288,911.20x = 433,366.80 × 131,447.20
  4. Step 4: Simplify right side
    288,911.20x = 56,964,852,432.96
  5. Step 5: Solve for x
    x = 56,964,852,432.96/288,911.20
  6. Step 6: Final answer
    x = 197,170.80

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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.