Home / 429,219.09-642,576.15-321,625.40

Finding the Fourth Proportional to 429,219.09, 642,576.15 and 321,625.40

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Solution

The fourth proportional to 429,219.09, 642,576.15 and 321,625.40 is: 481,499.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,219.09 : 642,576.15 = 321,625.40 : x
  2. Step 2: Convert to fraction form
    429,219.09/642,576.15 = 321,625.40/x
  3. Step 3: Cross multiply
    429,219.09x = 642,576.15 × 321,625.40
  4. Step 4: Simplify right side
    429,219.09x = 206,668,808,061.33
  5. Step 5: Solve for x
    x = 206,668,808,061.33/429,219.09
  6. Step 6: Final answer
    x = 481,499.57

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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.