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Finding the Fourth Proportional to 561,713.70, 775,170.06 and 319,992.68

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Solution

The fourth proportional to 561,713.70, 775,170.06 and 319,992.68 is: 441,592.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,713.70 : 775,170.06 = 319,992.68 : x
  2. Step 2: Convert to fraction form
    561,713.70/775,170.06 = 319,992.68/x
  3. Step 3: Cross multiply
    561,713.70x = 775,170.06 × 319,992.68
  4. Step 4: Simplify right side
    561,713.70x = 248,048,744,955.16
  5. Step 5: Solve for x
    x = 248,048,744,955.16/561,713.70
  6. Step 6: Final answer
    x = 441,592.83

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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.