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Finding the Fourth Proportional to 561,354.55, 774,676.75 and 319,638.08

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Solution

The fourth proportional to 561,354.55, 774,676.75 and 319,638.08 is: 441,104.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,354.55 : 774,676.75 = 319,638.08 : x
  2. Step 2: Convert to fraction form
    561,354.55/774,676.75 = 319,638.08/x
  3. Step 3: Cross multiply
    561,354.55x = 774,676.75 × 319,638.08
  4. Step 4: Simplify right side
    561,354.55x = 247,616,188,643.98
  5. Step 5: Solve for x
    x = 247,616,188,643.98/561,354.55
  6. Step 6: Final answer
    x = 441,104.81

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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.