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Finding the Fourth Proportional to 621,472.24, 857,630.46 and 349,535.80

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Solution

The fourth proportional to 621,472.24, 857,630.46 and 349,535.80 is: 482,358.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,472.24 : 857,630.46 = 349,535.80 : x
  2. Step 2: Convert to fraction form
    621,472.24/857,630.46 = 349,535.80/x
  3. Step 3: Cross multiply
    621,472.24x = 857,630.46 × 349,535.80
  4. Step 4: Simplify right side
    621,472.24x = 299,772,548,940.47
  5. Step 5: Solve for x
    x = 299,772,548,940.47/621,472.24
  6. Step 6: Final answer
    x = 482,358.71

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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.