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Finding the Fourth Proportional to 561,127.70, 774,356.22 and 306,479.49

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Solution

The fourth proportional to 561,127.70, 774,356.22 and 306,479.49 is: 422,941.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,127.70 : 774,356.22 = 306,479.49 : x
  2. Step 2: Convert to fraction form
    561,127.70/774,356.22 = 306,479.49/x
  3. Step 3: Cross multiply
    561,127.70x = 774,356.22 × 306,479.49
  4. Step 4: Simplify right side
    561,127.70x = 237,324,299,383.93
  5. Step 5: Solve for x
    x = 237,324,299,383.93/561,127.70
  6. Step 6: Final answer
    x = 422,941.69

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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.