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Finding the Fourth Proportional to 260,227.28, 390,571.32 and 133,956.56

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Solution

The fourth proportional to 260,227.28, 390,571.32 and 133,956.56 is: 201,053.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,227.28 : 390,571.32 = 133,956.56 : x
  2. Step 2: Convert to fraction form
    260,227.28/390,571.32 = 133,956.56/x
  3. Step 3: Cross multiply
    260,227.28x = 390,571.32 × 133,956.56
  4. Step 4: Simplify right side
    260,227.28x = 52,319,590,461.86
  5. Step 5: Solve for x
    x = 52,319,590,461.86/260,227.28
  6. Step 6: Final answer
    x = 201,053.44

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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.