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Finding the Fourth Proportional to 429,858, 643,900.78 and 251,825.27

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Solution

The fourth proportional to 429,858, 643,900.78 and 251,825.27 is: 377,218.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,858 : 643,900.78 = 251,825.27 : x
  2. Step 2: Convert to fraction form
    429,858/643,900.78 = 251,825.27/x
  3. Step 3: Cross multiply
    429,858x = 643,900.78 × 251,825.27
  4. Step 4: Simplify right side
    429,858x = 162,150,484,871.99
  5. Step 5: Solve for x
    x = 162,150,484,871.99/429,858
  6. Step 6: Final answer
    x = 377,218.72

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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.