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Finding the Fourth Proportional to 429,395.20, 643,315.20 and 367,187.20

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Solution

The fourth proportional to 429,395.20, 643,315.20 and 367,187.20 is: 550,115.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,395.20 : 643,315.20 = 367,187.20 : x
  2. Step 2: Convert to fraction form
    429,395.20/643,315.20 = 367,187.20/x
  3. Step 3: Cross multiply
    429,395.20x = 643,315.20 × 367,187.20
  4. Step 4: Simplify right side
    429,395.20x = 236,217,107,005.44
  5. Step 5: Solve for x
    x = 236,217,107,005.44/429,395.20
  6. Step 6: Final answer
    x = 550,115.85

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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.