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Finding the Fourth Proportional to 323,781.80, 485,672.70 and 256,859.60

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Solution

The fourth proportional to 323,781.80, 485,672.70 and 256,859.60 is: 385,289.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,781.80 : 485,672.70 = 256,859.60 : x
  2. Step 2: Convert to fraction form
    323,781.80/485,672.70 = 256,859.60/x
  3. Step 3: Cross multiply
    323,781.80x = 485,672.70 × 256,859.60
  4. Step 4: Simplify right side
    323,781.80x = 124,749,695,452.92
  5. Step 5: Solve for x
    x = 124,749,695,452.92/323,781.80
  6. Step 6: Final answer
    x = 385,289.40

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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.