Home / 429,220.09-642,577.65-321,626.40

Finding the Fourth Proportional to 429,220.09, 642,577.65 and 321,626.40

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Solution

The fourth proportional to 429,220.09, 642,577.65 and 321,626.40 is: 481,501.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,220.09 : 642,577.65 = 321,626.40 : x
  2. Step 2: Convert to fraction form
    429,220.09/642,577.65 = 321,626.40/x
  3. Step 3: Cross multiply
    429,220.09x = 642,577.65 × 321,626.40
  4. Step 4: Simplify right side
    429,220.09x = 206,669,936,289.96
  5. Step 5: Solve for x
    x = 206,669,936,289.96/429,220.09
  6. Step 6: Final answer
    x = 481,501.08

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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.