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Finding the Fourth Proportional to 412,859.40, 619,289.10 and 255,265.80

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Solution

The fourth proportional to 412,859.40, 619,289.10 and 255,265.80 is: 382,898.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,859.40 : 619,289.10 = 255,265.80 : x
  2. Step 2: Convert to fraction form
    412,859.40/619,289.10 = 255,265.80/x
  3. Step 3: Cross multiply
    412,859.40x = 619,289.10 × 255,265.80
  4. Step 4: Simplify right side
    412,859.40x = 158,083,327,542.78
  5. Step 5: Solve for x
    x = 158,083,327,542.78/412,859.40
  6. Step 6: Final answer
    x = 382,898.70

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Similar ratio
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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.