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Finding the Fourth Proportional to 621,658.31, 857,839.41 and 349,672.05

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Solution

The fourth proportional to 621,658.31, 857,839.41 and 349,672.05 is: 482,519.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,658.31 : 857,839.41 = 349,672.05 : x
  2. Step 2: Convert to fraction form
    621,658.31/857,839.41 = 349,672.05/x
  3. Step 3: Cross multiply
    621,658.31x = 857,839.41 × 349,672.05
  4. Step 4: Simplify right side
    621,658.31x = 299,962,465,065.49
  5. Step 5: Solve for x
    x = 299,962,465,065.49/621,658.31
  6. Step 6: Final answer
    x = 482,519.84

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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.