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Finding the Fourth Proportional to 878,406, 1,317,592.60 and 279,408.58

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Solution

The fourth proportional to 878,406, 1,317,592.60 and 279,408.58 is: 419,107.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,406 : 1,317,592.60 = 279,408.58 : x
  2. Step 2: Convert to fraction form
    878,406/1,317,592.60 = 279,408.58/x
  3. Step 3: Cross multiply
    878,406x = 1,317,592.60 × 279,408.58
  4. Step 4: Simplify right side
    878,406x = 368,146,677,384.51
  5. Step 5: Solve for x
    x = 368,146,677,384.51/878,406
  6. Step 6: Final answer
    x = 419,107.65

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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.