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Finding the Fourth Proportional to 978,961.14, 1,351,047.80 and 543,419.48

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Solution

The fourth proportional to 978,961.14, 1,351,047.80 and 543,419.48 is: 749,964.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,961.14 : 1,351,047.80 = 543,419.48 : x
  2. Step 2: Convert to fraction form
    978,961.14/1,351,047.80 = 543,419.48/x
  3. Step 3: Cross multiply
    978,961.14x = 1,351,047.80 × 543,419.48
  4. Step 4: Simplify right side
    978,961.14x = 734,185,697,667.31
  5. Step 5: Solve for x
    x = 734,185,697,667.31/978,961.14
  6. Step 6: Final answer
    x = 749,964.09

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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.