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Finding the Fourth Proportional to 300,981.76, 415,396.80 and 173,655.04

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Solution

The fourth proportional to 300,981.76, 415,396.80 and 173,655.04 is: 239,668.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,981.76 : 415,396.80 = 173,655.04 : x
  2. Step 2: Convert to fraction form
    300,981.76/415,396.80 = 173,655.04/x
  3. Step 3: Cross multiply
    300,981.76x = 415,396.80 × 173,655.04
  4. Step 4: Simplify right side
    300,981.76x = 72,135,747,919.87
  5. Step 5: Solve for x
    x = 72,135,747,919.87/300,981.76
  6. Step 6: Final answer
    x = 239,668.17

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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.