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Finding the Fourth Proportional to 978,689.85, 1,350,589.23 and 543,172.95

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Solution

The fourth proportional to 978,689.85, 1,350,589.23 and 543,172.95 is: 749,577.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,689.85 : 1,350,589.23 = 543,172.95 : x
  2. Step 2: Convert to fraction form
    978,689.85/1,350,589.23 = 543,172.95/x
  3. Step 3: Cross multiply
    978,689.85x = 1,350,589.23 × 543,172.95
  4. Step 4: Simplify right side
    978,689.85x = 733,603,536,297.33
  5. Step 5: Solve for x
    x = 733,603,536,297.33/978,689.85
  6. Step 6: Final answer
    x = 749,577.14

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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.