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Finding the Fourth Proportional to 561,221.38, 774,456.48 and 306,523.36

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Solution

The fourth proportional to 561,221.38, 774,456.48 and 306,523.36 is: 422,986.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,221.38 : 774,456.48 = 306,523.36 : x
  2. Step 2: Convert to fraction form
    561,221.38/774,456.48 = 306,523.36/x
  3. Step 3: Cross multiply
    561,221.38x = 774,456.48 × 306,523.36
  4. Step 4: Simplify right side
    561,221.38x = 237,389,002,423.37
  5. Step 5: Solve for x
    x = 237,389,002,423.37/561,221.38
  6. Step 6: Final answer
    x = 422,986.38

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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.