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Finding the Fourth Proportional to 978,900.22, 1,350,882.80 and 543,317.75

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Solution

The fourth proportional to 978,900.22, 1,350,882.80 and 543,317.75 is: 749,778.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,900.22 : 1,350,882.80 = 543,317.75 : x
  2. Step 2: Convert to fraction form
    978,900.22/1,350,882.80 = 543,317.75/x
  3. Step 3: Cross multiply
    978,900.22x = 1,350,882.80 × 543,317.75
  4. Step 4: Simplify right side
    978,900.22x = 733,958,604,841.31
  5. Step 5: Solve for x
    x = 733,958,604,841.31/978,900.22
  6. Step 6: Final answer
    x = 749,778.77

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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.