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Finding the Fourth Proportional to 310,691.55, 428,750.25 and 174,725.43

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Solution

The fourth proportional to 310,691.55, 428,750.25 and 174,725.43 is: 241,118.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,691.55 : 428,750.25 = 174,725.43 : x
  2. Step 2: Convert to fraction form
    310,691.55/428,750.25 = 174,725.43/x
  3. Step 3: Cross multiply
    310,691.55x = 428,750.25 × 174,725.43
  4. Step 4: Simplify right side
    310,691.55x = 74,913,571,793.86
  5. Step 5: Solve for x
    x = 74,913,571,793.86/310,691.55
  6. Step 6: Final answer
    x = 241,118.79

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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.