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Finding the Fourth Proportional to 561,716.28, 775,109.88 and 319,948.20

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Solution

The fourth proportional to 561,716.28, 775,109.88 and 319,948.20 is: 441,495.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,716.28 : 775,109.88 = 319,948.20 : x
  2. Step 2: Convert to fraction form
    561,716.28/775,109.88 = 319,948.20/x
  3. Step 3: Cross multiply
    561,716.28x = 775,109.88 × 319,948.20
  4. Step 4: Simplify right side
    561,716.28x = 247,995,010,908.22
  5. Step 5: Solve for x
    x = 247,995,010,908.22/561,716.28
  6. Step 6: Final answer
    x = 441,495.15

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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.