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Finding the Fourth Proportional to 311,029.50, 429,272.55 and 235,446.78

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Solution

The fourth proportional to 311,029.50, 429,272.55 and 235,446.78 is: 324,955.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,029.50 : 429,272.55 = 235,446.78 : x
  2. Step 2: Convert to fraction form
    311,029.50/429,272.55 = 235,446.78/x
  3. Step 3: Cross multiply
    311,029.50x = 429,272.55 × 235,446.78
  4. Step 4: Simplify right side
    311,029.50x = 101,070,839,639.89
  5. Step 5: Solve for x
    x = 101,070,839,639.89/311,029.50
  6. Step 6: Final answer
    x = 324,955.80

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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.