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Finding the Fourth Proportional to 40,231.20, 60,411.60 and 30,381.60

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Solution

The fourth proportional to 40,231.20, 60,411.60 and 30,381.60 is: 45,621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,231.20 : 60,411.60 = 30,381.60 : x
  2. Step 2: Convert to fraction form
    40,231.20/60,411.60 = 30,381.60/x
  3. Step 3: Cross multiply
    40,231.20x = 60,411.60 × 30,381.60
  4. Step 4: Simplify right side
    40,231.20x = 1,835,401,066.56
  5. Step 5: Solve for x
    x = 1,835,401,066.56/40,231.20
  6. Step 6: Final answer
    x = 45,621.34

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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.