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Finding the Fourth Proportional to 561,713.19, 775,169.36 and 319,992.18

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Solution

The fourth proportional to 561,713.19, 775,169.36 and 319,992.18 is: 441,592.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,713.19 : 775,169.36 = 319,992.18 : x
  2. Step 2: Convert to fraction form
    561,713.19/775,169.36 = 319,992.18/x
  3. Step 3: Cross multiply
    561,713.19x = 775,169.36 × 319,992.18
  4. Step 4: Simplify right side
    561,713.19x = 248,048,133,375.61
  5. Step 5: Solve for x
    x = 248,048,133,375.61/561,713.19
  6. Step 6: Final answer
    x = 441,592.15

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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.