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Finding the Fourth Proportional to 388,971.60, 582,679.80 and 222,565.20

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Solution

The fourth proportional to 388,971.60, 582,679.80 and 222,565.20 is: 333,402.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,971.60 : 582,679.80 = 222,565.20 : x
  2. Step 2: Convert to fraction form
    388,971.60/582,679.80 = 222,565.20/x
  3. Step 3: Cross multiply
    388,971.60x = 582,679.80 × 222,565.20
  4. Step 4: Simplify right side
    388,971.60x = 129,684,246,222.96
  5. Step 5: Solve for x
    x = 129,684,246,222.96/388,971.60
  6. Step 6: Final answer
    x = 333,402.87

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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.