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Finding the Fourth Proportional to 1,791,982.78, 2,472,935.15 and 987,166.78

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Solution

The fourth proportional to 1,791,982.78, 2,472,935.15 and 987,166.78 is: 1,362,289.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791,982.78 : 2,472,935.15 = 987,166.78 : x
  2. Step 2: Convert to fraction form
    1,791,982.78/2,472,935.15 = 987,166.78/x
  3. Step 3: Cross multiply
    1,791,982.78x = 2,472,935.15 × 987,166.78
  4. Step 4: Simplify right side
    1,791,982.78x = 2,441,199,425,459.90
  5. Step 5: Solve for x
    x = 2,441,199,425,459.90/1,791,982.78
  6. Step 6: Final answer
    x = 1,362,289.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.