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Finding the Fourth Proportional to 717,367.28, 989,954.78 and 395,107.38

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Solution

The fourth proportional to 717,367.28, 989,954.78 and 395,107.38 is: 545,241.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,367.28 : 989,954.78 = 395,107.38 : x
  2. Step 2: Convert to fraction form
    717,367.28/989,954.78 = 395,107.38/x
  3. Step 3: Cross multiply
    717,367.28x = 989,954.78 × 395,107.38
  4. Step 4: Simplify right side
    717,367.28x = 391,138,437,468.74
  5. Step 5: Solve for x
    x = 391,138,437,468.74/717,367.28
  6. Step 6: Final answer
    x = 545,241.54

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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.