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Finding the Fourth Proportional to 316,439.60, 474,987.65 and 211,988.48

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Solution

The fourth proportional to 316,439.60, 474,987.65 and 211,988.48 is: 318,202.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,439.60 : 474,987.65 = 211,988.48 : x
  2. Step 2: Convert to fraction form
    316,439.60/474,987.65 = 211,988.48/x
  3. Step 3: Cross multiply
    316,439.60x = 474,987.65 × 211,988.48
  4. Step 4: Simplify right side
    316,439.60x = 100,691,906,507.39
  5. Step 5: Solve for x
    x = 100,691,906,507.39/316,439.60
  6. Step 6: Final answer
    x = 318,202.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.