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Finding the Fourth Proportional to 658,255.80, 987,416.10 and 343,327.80

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Solution

The fourth proportional to 658,255.80, 987,416.10 and 343,327.80 is: 515,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,255.80 : 987,416.10 = 343,327.80 : x
  2. Step 2: Convert to fraction form
    658,255.80/987,416.10 = 343,327.80/x
  3. Step 3: Cross multiply
    658,255.80x = 987,416.10 × 343,327.80
  4. Step 4: Simplify right side
    658,255.80x = 339,007,397,297.58
  5. Step 5: Solve for x
    x = 339,007,397,297.58/658,255.80
  6. Step 6: Final answer
    x = 515,008.60

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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.