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Finding the Fourth Proportional to 238,978.20, 358,661.70 and 231,202.20

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Solution

The fourth proportional to 238,978.20, 358,661.70 and 231,202.20 is: 346,991.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,978.20 : 358,661.70 = 231,202.20 : x
  2. Step 2: Convert to fraction form
    238,978.20/358,661.70 = 231,202.20/x
  3. Step 3: Cross multiply
    238,978.20x = 358,661.70 × 231,202.20
  4. Step 4: Simplify right side
    238,978.20x = 82,923,374,095.74
  5. Step 5: Solve for x
    x = 82,923,374,095.74/238,978.20
  6. Step 6: Final answer
    x = 346,991.37

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1.5x scale

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.