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Finding the Fourth Proportional to 658,021.15, 908,072.09 and 356,215.15

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Solution

The fourth proportional to 658,021.15, 908,072.09 and 356,215.15 is: 491,578.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,021.15 : 908,072.09 = 356,215.15 : x
  2. Step 2: Convert to fraction form
    658,021.15/908,072.09 = 356,215.15/x
  3. Step 3: Cross multiply
    658,021.15x = 908,072.09 × 356,215.15
  4. Step 4: Simplify right side
    658,021.15x = 323,469,035,750.16
  5. Step 5: Solve for x
    x = 323,469,035,750.16/658,021.15
  6. Step 6: Final answer
    x = 491,578.48

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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.