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Finding the Fourth Proportional to 978,531.84, 1,350,419.42 and 611,226.48

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Solution

The fourth proportional to 978,531.84, 1,350,419.42 and 611,226.48 is: 843,520.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,531.84 : 1,350,419.42 = 611,226.48 : x
  2. Step 2: Convert to fraction form
    978,531.84/1,350,419.42 = 611,226.48/x
  3. Step 3: Cross multiply
    978,531.84x = 1,350,419.42 × 611,226.48
  4. Step 4: Simplify right side
    978,531.84x = 825,412,109,685.25
  5. Step 5: Solve for x
    x = 825,412,109,685.25/978,531.84
  6. Step 6: Final answer
    x = 843,520.95

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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.