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Finding the Fourth Proportional to 561,233.43, 774,472.73 and 319,515.12

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Solution

The fourth proportional to 561,233.43, 774,472.73 and 319,515.12 is: 440,914.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,233.43 : 774,472.73 = 319,515.12 : x
  2. Step 2: Convert to fraction form
    561,233.43/774,472.73 = 319,515.12/x
  3. Step 3: Cross multiply
    561,233.43x = 774,472.73 × 319,515.12
  4. Step 4: Simplify right side
    561,233.43x = 247,455,745,665.10
  5. Step 5: Solve for x
    x = 247,455,745,665.10/561,233.43
  6. Step 6: Final answer
    x = 440,914.12

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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.