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Finding the Fourth Proportional to 429,778.78, 644,796.96 and 173,479.39

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Solution

The fourth proportional to 429,778.78, 644,796.96 and 173,479.39 is: 260,271.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,778.78 : 644,796.96 = 173,479.39 : x
  2. Step 2: Convert to fraction form
    429,778.78/644,796.96 = 173,479.39/x
  3. Step 3: Cross multiply
    429,778.78x = 644,796.96 × 173,479.39
  4. Step 4: Simplify right side
    429,778.78x = 111,858,983,294.65
  5. Step 5: Solve for x
    x = 111,858,983,294.65/429,778.78
  6. Step 6: Final answer
    x = 260,271.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.