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Finding the Fourth Proportional to 658,021.65, 908,072.78 and 356,215.65

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Solution

The fourth proportional to 658,021.65, 908,072.78 and 356,215.65 is: 491,579.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,021.65 : 908,072.78 = 356,215.65 : x
  2. Step 2: Convert to fraction form
    658,021.65/908,072.78 = 356,215.65/x
  3. Step 3: Cross multiply
    658,021.65x = 908,072.78 × 356,215.65
  4. Step 4: Simplify right side
    658,021.65x = 323,469,733,793.93
  5. Step 5: Solve for x
    x = 323,469,733,793.93/658,021.65
  6. Step 6: Final answer
    x = 491,579.17

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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.