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Finding the Fourth Proportional to 978,111.63, 1,467,172.53 and 445,260.02

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Solution

The fourth proportional to 978,111.63, 1,467,172.53 and 445,260.02 is: 667,892.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,111.63 : 1,467,172.53 = 445,260.02 : x
  2. Step 2: Convert to fraction form
    978,111.63/1,467,172.53 = 445,260.02/x
  3. Step 3: Cross multiply
    978,111.63x = 1,467,172.53 × 445,260.02
  4. Step 4: Simplify right side
    978,111.63x = 653,273,262,715.39
  5. Step 5: Solve for x
    x = 653,273,262,715.39/978,111.63
  6. Step 6: Final answer
    x = 667,892.34

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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.