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Finding the Fourth Proportional to 402,121.15, 602,262.78 and 191,906.71

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Solution

The fourth proportional to 402,121.15, 602,262.78 and 191,906.71 is: 287,421.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,121.15 : 602,262.78 = 191,906.71 : x
  2. Step 2: Convert to fraction form
    402,121.15/602,262.78 = 191,906.71/x
  3. Step 3: Cross multiply
    402,121.15x = 602,262.78 × 191,906.71
  4. Step 4: Simplify right side
    402,121.15x = 115,578,268,665.25
  5. Step 5: Solve for x
    x = 115,578,268,665.25/402,121.15
  6. Step 6: Final answer
    x = 287,421.51

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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.