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Finding the Fourth Proportional to 429,340.37, 644,012.78 and 251,722.82

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Solution

The fourth proportional to 429,340.37, 644,012.78 and 251,722.82 is: 377,585.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,340.37 : 644,012.78 = 251,722.82 : x
  2. Step 2: Convert to fraction form
    429,340.37/644,012.78 = 251,722.82/x
  3. Step 3: Cross multiply
    429,340.37x = 644,012.78 × 251,722.82
  4. Step 4: Simplify right side
    429,340.37x = 162,112,708,618.96
  5. Step 5: Solve for x
    x = 162,112,708,618.96/429,340.37
  6. Step 6: Final answer
    x = 377,585.53

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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.