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Finding the Fourth Proportional to 878,463, 1,212,278.94 and 476,055

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Solution

The fourth proportional to 878,463, 1,212,278.94 and 476,055 is: 656,955.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,463 : 1,212,278.94 = 476,055 : x
  2. Step 2: Convert to fraction form
    878,463/1,212,278.94 = 476,055/x
  3. Step 3: Cross multiply
    878,463x = 1,212,278.94 × 476,055
  4. Step 4: Simplify right side
    878,463x = 577,111,450,781.70
  5. Step 5: Solve for x
    x = 577,111,450,781.70/878,463
  6. Step 6: Final answer
    x = 656,955.90

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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.