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Finding the Fourth Proportional to 342,316.11, 472,359.87 and 189,330

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Solution

The fourth proportional to 342,316.11, 472,359.87 and 189,330 is: 261,255.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,316.11 : 472,359.87 = 189,330 : x
  2. Step 2: Convert to fraction form
    342,316.11/472,359.87 = 189,330/x
  3. Step 3: Cross multiply
    342,316.11x = 472,359.87 × 189,330
  4. Step 4: Simplify right side
    342,316.11x = 89,431,894,187.10
  5. Step 5: Solve for x
    x = 89,431,894,187.10/342,316.11
  6. Step 6: Final answer
    x = 261,255.29

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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.