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Finding the Fourth Proportional to 978,855.09, 1,350,799.70 and 543,247.16

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Solution

The fourth proportional to 978,855.09, 1,350,799.70 and 543,247.16 is: 749,669.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,855.09 : 1,350,799.70 = 543,247.16 : x
  2. Step 2: Convert to fraction form
    978,855.09/1,350,799.70 = 543,247.16/x
  3. Step 3: Cross multiply
    978,855.09x = 1,350,799.70 × 543,247.16
  4. Step 4: Simplify right side
    978,855.09x = 733,818,091,283.62
  5. Step 5: Solve for x
    x = 733,818,091,283.62/978,855.09
  6. Step 6: Final answer
    x = 749,669.79

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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.