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Finding the Fourth Proportional to 316,410.15, 436,643.43 and 173,169.85

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Solution

The fourth proportional to 316,410.15, 436,643.43 and 173,169.85 is: 238,972.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,410.15 : 436,643.43 = 173,169.85 : x
  2. Step 2: Convert to fraction form
    316,410.15/436,643.43 = 173,169.85/x
  3. Step 3: Cross multiply
    316,410.15x = 436,643.43 × 173,169.85
  4. Step 4: Simplify right side
    316,410.15x = 75,613,477,815.42
  5. Step 5: Solve for x
    x = 75,613,477,815.42/316,410.15
  6. Step 6: Final answer
    x = 238,972.99

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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.