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Finding the Fourth Proportional to 621,662.12, 857,813.06 and 349,720.84

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Solution

The fourth proportional to 621,662.12, 857,813.06 and 349,720.84 is: 482,569.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,662.12 : 857,813.06 = 349,720.84 : x
  2. Step 2: Convert to fraction form
    621,662.12/857,813.06 = 349,720.84/x
  3. Step 3: Cross multiply
    621,662.12x = 857,813.06 × 349,720.84
  4. Step 4: Simplify right side
    621,662.12x = 299,995,103,906.17
  5. Step 5: Solve for x
    x = 299,995,103,906.17/621,662.12
  6. Step 6: Final answer
    x = 482,569.38

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Double scale
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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.