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Finding the Fourth Proportional to 399,070, 550,717.32 and 220,222

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Solution

The fourth proportional to 399,070, 550,717.32 and 220,222 is: 303,906.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,070 : 550,717.32 = 220,222 : x
  2. Step 2: Convert to fraction form
    399,070/550,717.32 = 220,222/x
  3. Step 3: Cross multiply
    399,070x = 550,717.32 × 220,222
  4. Step 4: Simplify right side
    399,070x = 121,280,069,645.04
  5. Step 5: Solve for x
    x = 121,280,069,645.04/399,070
  6. Step 6: Final answer
    x = 303,906.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.