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Finding the Fourth Proportional to 978,049.80, 1,465,106.40 and 659,185.20

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Solution

The fourth proportional to 978,049.80, 1,465,106.40 and 659,185.20 is: 987,451.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,049.80 : 1,465,106.40 = 659,185.20 : x
  2. Step 2: Convert to fraction form
    978,049.80/1,465,106.40 = 659,185.20/x
  3. Step 3: Cross multiply
    978,049.80x = 1,465,106.40 × 659,185.20
  4. Step 4: Simplify right side
    978,049.80x = 965,776,455,305.28
  5. Step 5: Solve for x
    x = 965,776,455,305.28/978,049.80
  6. Step 6: Final answer
    x = 987,451.21

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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.