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Finding the Fourth Proportional to 353,679.91, 487,934.04 and 217,672.81

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Solution

The fourth proportional to 353,679.91, 487,934.04 and 217,672.81 is: 300,299.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,679.91 : 487,934.04 = 217,672.81 : x
  2. Step 2: Convert to fraction form
    353,679.91/487,934.04 = 217,672.81/x
  3. Step 3: Cross multiply
    353,679.91x = 487,934.04 × 217,672.81
  4. Step 4: Simplify right side
    353,679.91x = 106,209,973,581.45
  5. Step 5: Solve for x
    x = 106,209,973,581.45/353,679.91
  6. Step 6: Final answer
    x = 300,299.71

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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.