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Finding the Fourth Proportional to 621,505.22, 857,753.28 and 349,584.57

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Solution

The fourth proportional to 621,505.22, 857,753.28 and 349,584.57 is: 482,469.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,505.22 : 857,753.28 = 349,584.57 : x
  2. Step 2: Convert to fraction form
    621,505.22/857,753.28 = 349,584.57/x
  3. Step 3: Cross multiply
    621,505.22x = 857,753.28 × 349,584.57
  4. Step 4: Simplify right side
    621,505.22x = 299,857,311,554.89
  5. Step 5: Solve for x
    x = 299,857,311,554.89/621,505.22
  6. Step 6: Final answer
    x = 482,469.50

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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.