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Finding the Fourth Proportional to 978,087.80, 1,465,163.40 and 659,223.20

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Solution

The fourth proportional to 978,087.80, 1,465,163.40 and 659,223.20 is: 987,508.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,087.80 : 1,465,163.40 = 659,223.20 : x
  2. Step 2: Convert to fraction form
    978,087.80/1,465,163.40 = 659,223.20/x
  3. Step 3: Cross multiply
    978,087.80x = 1,465,163.40 × 659,223.20
  4. Step 4: Simplify right side
    978,087.80x = 965,869,705,070.88
  5. Step 5: Solve for x
    x = 965,869,705,070.88/978,087.80
  6. Step 6: Final answer
    x = 987,508.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.