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Finding the Fourth Proportional to 620,806, 856,712.28 and 338,182

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Solution

The fourth proportional to 620,806, 856,712.28 and 338,182 is: 466,691.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,806 : 856,712.28 = 338,182 : x
  2. Step 2: Convert to fraction form
    620,806/856,712.28 = 338,182/x
  3. Step 3: Cross multiply
    620,806x = 856,712.28 × 338,182
  4. Step 4: Simplify right side
    620,806x = 289,724,672,274.96
  5. Step 5: Solve for x
    x = 289,724,672,274.96/620,806
  6. Step 6: Final answer
    x = 466,691.16

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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.