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Finding the Fourth Proportional to 381,540.60, 572,400.81 and 115,303.32

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Solution

The fourth proportional to 381,540.60, 572,400.81 and 115,303.32 is: 172,982.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,540.60 : 572,400.81 = 115,303.32 : x
  2. Step 2: Convert to fraction form
    381,540.60/572,400.81 = 115,303.32/x
  3. Step 3: Cross multiply
    381,540.60x = 572,400.81 × 115,303.32
  4. Step 4: Simplify right side
    381,540.60x = 65,999,713,763.69
  5. Step 5: Solve for x
    x = 65,999,713,763.69/381,540.60
  6. Step 6: Final answer
    x = 172,982.15

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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.