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Finding the Fourth Proportional to 316,178.52, 436,326.84 and 172,938.12

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Solution

The fourth proportional to 316,178.52, 436,326.84 and 172,938.12 is: 238,654.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,178.52 : 436,326.84 = 172,938.12 : x
  2. Step 2: Convert to fraction form
    316,178.52/436,326.84 = 172,938.12/x
  3. Step 3: Cross multiply
    316,178.52x = 436,326.84 × 172,938.12
  4. Step 4: Simplify right side
    316,178.52x = 75,457,543,415.14
  5. Step 5: Solve for x
    x = 75,457,543,415.14/316,178.52
  6. Step 6: Final answer
    x = 238,654.87

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1.5x scale

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.