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Finding the Fourth Proportional to 219,818.80, 329,728.20 and 143,711.20

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Solution

The fourth proportional to 219,818.80, 329,728.20 and 143,711.20 is: 215,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,818.80 : 329,728.20 = 143,711.20 : x
  2. Step 2: Convert to fraction form
    219,818.80/329,728.20 = 143,711.20/x
  3. Step 3: Cross multiply
    219,818.80x = 329,728.20 × 143,711.20
  4. Step 4: Simplify right side
    219,818.80x = 47,385,635,295.84
  5. Step 5: Solve for x
    x = 47,385,635,295.84/219,818.80
  6. Step 6: Final answer
    x = 215,566.80

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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.