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Finding the Fourth Proportional to 978,843.20, 1,350,812.84 and 549,132.56

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Solution

The fourth proportional to 978,843.20, 1,350,812.84 and 549,132.56 is: 757,808.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,843.20 : 1,350,812.84 = 549,132.56 : x
  2. Step 2: Convert to fraction form
    978,843.20/1,350,812.84 = 549,132.56/x
  3. Step 3: Cross multiply
    978,843.20x = 1,350,812.84 × 549,132.56
  4. Step 4: Simplify right side
    978,843.20x = 741,775,312,910.07
  5. Step 5: Solve for x
    x = 741,775,312,910.07/978,843.20
  6. Step 6: Final answer
    x = 757,808.11

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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.