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Finding the Fourth Proportional to 372,612.60, 559,289.70 and 172,978.20

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Solution

The fourth proportional to 372,612.60, 559,289.70 and 172,978.20 is: 259,639.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,612.60 : 559,289.70 = 172,978.20 : x
  2. Step 2: Convert to fraction form
    372,612.60/559,289.70 = 172,978.20/x
  3. Step 3: Cross multiply
    372,612.60x = 559,289.70 × 172,978.20
  4. Step 4: Simplify right side
    372,612.60x = 96,744,925,584.54
  5. Step 5: Solve for x
    x = 96,744,925,584.54/372,612.60
  6. Step 6: Final answer
    x = 259,639.44

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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.