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Finding the Fourth Proportional to 561,212.82, 774,444.78 and 306,514.80

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Solution

The fourth proportional to 561,212.82, 774,444.78 and 306,514.80 is: 422,974.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,212.82 : 774,444.78 = 306,514.80 : x
  2. Step 2: Convert to fraction form
    561,212.82/774,444.78 = 306,514.80/x
  3. Step 3: Cross multiply
    561,212.82x = 774,444.78 × 306,514.80
  4. Step 4: Simplify right side
    561,212.82x = 237,378,786,852.74
  5. Step 5: Solve for x
    x = 237,378,786,852.74/561,212.82
  6. Step 6: Final answer
    x = 422,974.63

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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.