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Finding the Fourth Proportional to 379,080.40, 523,120.88 and 209,310.88

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Solution

The fourth proportional to 379,080.40, 523,120.88 and 209,310.88 is: 288,843.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,080.40 : 523,120.88 = 209,310.88 : x
  2. Step 2: Convert to fraction form
    379,080.40/523,120.88 = 209,310.88/x
  3. Step 3: Cross multiply
    379,080.40x = 523,120.88 × 209,310.88
  4. Step 4: Simplify right side
    379,080.40x = 109,494,891,739.17
  5. Step 5: Solve for x
    x = 109,494,891,739.17/379,080.40
  6. Step 6: Final answer
    x = 288,843.45

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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.