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Finding the Fourth Proportional to 444,393.76, 666,688.56 and 128,863.84

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Solution

The fourth proportional to 444,393.76, 666,688.56 and 128,863.84 is: 193,324.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    444,393.76 : 666,688.56 = 128,863.84 : x
  2. Step 2: Convert to fraction form
    444,393.76/666,688.56 = 128,863.84/x
  3. Step 3: Cross multiply
    444,393.76x = 666,688.56 × 128,863.84
  4. Step 4: Simplify right side
    444,393.76x = 85,912,047,925.67
  5. Step 5: Solve for x
    x = 85,912,047,925.67/444,393.76
  6. Step 6: Final answer
    x = 193,324.15

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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.