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Finding the Fourth Proportional to 561,679.84, 774,928.92 and 319,791.26

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Solution

The fourth proportional to 561,679.84, 774,928.92 and 319,791.26 is: 441,204.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,679.84 : 774,928.92 = 319,791.26 : x
  2. Step 2: Convert to fraction form
    561,679.84/774,928.92 = 319,791.26/x
  3. Step 3: Cross multiply
    561,679.84x = 774,928.92 × 319,791.26
  4. Step 4: Simplify right side
    561,679.84x = 247,815,495,737.24
  5. Step 5: Solve for x
    x = 247,815,495,737.24/561,679.84
  6. Step 6: Final answer
    x = 441,204.18

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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.