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Finding the Fourth Proportional to 526,405.32, 789,608.10 and 147,381.90

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Solution

The fourth proportional to 526,405.32, 789,608.10 and 147,381.90 is: 221,072.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,405.32 : 789,608.10 = 147,381.90 : x
  2. Step 2: Convert to fraction form
    526,405.32/789,608.10 = 147,381.90/x
  3. Step 3: Cross multiply
    526,405.32x = 789,608.10 × 147,381.90
  4. Step 4: Simplify right side
    526,405.32x = 116,373,942,033.39
  5. Step 5: Solve for x
    x = 116,373,942,033.39/526,405.32
  6. Step 6: Final answer
    x = 221,072.88

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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.