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Finding the Fourth Proportional to 316,154.54, 436,284.02 and 172,911.51

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Solution

The fourth proportional to 316,154.54, 436,284.02 and 172,911.51 is: 238,612.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,154.54 : 436,284.02 = 172,911.51 : x
  2. Step 2: Convert to fraction form
    316,154.54/436,284.02 = 172,911.51/x
  3. Step 3: Cross multiply
    316,154.54x = 436,284.02 × 172,911.51
  4. Step 4: Simplify right side
    316,154.54x = 75,438,529,119.35
  5. Step 5: Solve for x
    x = 75,438,529,119.35/316,154.54
  6. Step 6: Final answer
    x = 238,612.83

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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.