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Finding the Fourth Proportional to 621,138.30, 857,151 and 349,217.70

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Solution

The fourth proportional to 621,138.30, 857,151 and 349,217.70 is: 481,909.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,138.30 : 857,151 = 349,217.70 : x
  2. Step 2: Convert to fraction form
    621,138.30/857,151 = 349,217.70/x
  3. Step 3: Cross multiply
    621,138.30x = 857,151 × 349,217.70
  4. Step 4: Simplify right side
    621,138.30x = 299,332,300,772.70
  5. Step 5: Solve for x
    x = 299,332,300,772.70/621,138.30
  6. Step 6: Final answer
    x = 481,909.26

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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.