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Finding the Fourth Proportional to 902,321.90, 1,245,121.42 and 520,274.88

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Solution

The fourth proportional to 902,321.90, 1,245,121.42 and 520,274.88 is: 717,931.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    902,321.90 : 1,245,121.42 = 520,274.88 : x
  2. Step 2: Convert to fraction form
    902,321.90/1,245,121.42 = 520,274.88/x
  3. Step 3: Cross multiply
    902,321.90x = 1,245,121.42 × 520,274.88
  4. Step 4: Simplify right side
    902,321.90x = 647,805,397,375.93
  5. Step 5: Solve for x
    x = 647,805,397,375.93/902,321.90
  6. Step 6: Final answer
    x = 717,931.59

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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.