Home / 429,222.09-642,580.65-321,628.40

Finding the Fourth Proportional to 429,222.09, 642,580.65 and 321,628.40

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Solution

The fourth proportional to 429,222.09, 642,580.65 and 321,628.40 is: 481,504.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,222.09 : 642,580.65 = 321,628.40 : x
  2. Step 2: Convert to fraction form
    429,222.09/642,580.65 = 321,628.40/x
  3. Step 3: Cross multiply
    429,222.09x = 642,580.65 × 321,628.40
  4. Step 4: Simplify right side
    429,222.09x = 206,672,186,330.46
  5. Step 5: Solve for x
    x = 206,672,186,330.46/429,222.09
  6. Step 6: Final answer
    x = 481,504.08

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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.