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Finding the Fourth Proportional to 561,876.09, 775,391.57 and 307,227.07

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Solution

The fourth proportional to 561,876.09, 775,391.57 and 307,227.07 is: 423,974.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,876.09 : 775,391.57 = 307,227.07 : x
  2. Step 2: Convert to fraction form
    561,876.09/775,391.57 = 307,227.07/x
  3. Step 3: Cross multiply
    561,876.09x = 775,391.57 × 307,227.07
  4. Step 4: Simplify right side
    561,876.09x = 238,221,280,153.80
  5. Step 5: Solve for x
    x = 238,221,280,153.80/561,876.09
  6. Step 6: Final answer
    x = 423,974.76

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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.