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Finding the Fourth Proportional to 978,091.76, 1,467,142.70 and 445,240.14

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Solution

The fourth proportional to 978,091.76, 1,467,142.70 and 445,240.14 is: 667,862.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,091.76 : 1,467,142.70 = 445,240.14 : x
  2. Step 2: Convert to fraction form
    978,091.76/1,467,142.70 = 445,240.14/x
  3. Step 3: Cross multiply
    978,091.76x = 1,467,142.70 × 445,240.14
  4. Step 4: Simplify right side
    978,091.76x = 653,230,818,921.78
  5. Step 5: Solve for x
    x = 653,230,818,921.78/978,091.76
  6. Step 6: Final answer
    x = 667,862.51

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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.