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Finding the Fourth Proportional to 431,058.60, 647,279.10 and 291,436.20

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Solution

The fourth proportional to 431,058.60, 647,279.10 and 291,436.20 is: 437,621.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,058.60 : 647,279.10 = 291,436.20 : x
  2. Step 2: Convert to fraction form
    431,058.60/647,279.10 = 291,436.20/x
  3. Step 3: Cross multiply
    431,058.60x = 647,279.10 × 291,436.20
  4. Step 4: Simplify right side
    431,058.60x = 188,640,561,243.42
  5. Step 5: Solve for x
    x = 188,640,561,243.42/431,058.60
  6. Step 6: Final answer
    x = 437,621.62

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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.