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Finding the Fourth Proportional to 718,043.87, 990,906.57 and 395,754.79

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Solution

The fourth proportional to 718,043.87, 990,906.57 and 395,754.79 is: 546,144.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,043.87 : 990,906.57 = 395,754.79 : x
  2. Step 2: Convert to fraction form
    718,043.87/990,906.57 = 395,754.79/x
  3. Step 3: Cross multiply
    718,043.87x = 990,906.57 × 395,754.79
  4. Step 4: Simplify right side
    718,043.87x = 392,156,021,519.97
  5. Step 5: Solve for x
    x = 392,156,021,519.97/718,043.87
  6. Step 6: Final answer
    x = 546,144.93

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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.