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Finding the Fourth Proportional to 390,168.80, 585,015.60 and 153,227.60

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Solution

The fourth proportional to 390,168.80, 585,015.60 and 153,227.60 is: 229,748.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,168.80 : 585,015.60 = 153,227.60 : x
  2. Step 2: Convert to fraction form
    390,168.80/585,015.60 = 153,227.60/x
  3. Step 3: Cross multiply
    390,168.80x = 585,015.60 × 153,227.60
  4. Step 4: Simplify right side
    390,168.80x = 89,640,536,350.56
  5. Step 5: Solve for x
    x = 89,640,536,350.56/390,168.80
  6. Step 6: Final answer
    x = 229,748.09

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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.