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Finding the Fourth Proportional to 978,040.80, 1,465,092.90 and 659,176.20

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Solution

The fourth proportional to 978,040.80, 1,465,092.90 and 659,176.20 is: 987,437.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,040.80 : 1,465,092.90 = 659,176.20 : x
  2. Step 2: Convert to fraction form
    978,040.80/1,465,092.90 = 659,176.20/x
  3. Step 3: Cross multiply
    978,040.80x = 1,465,092.90 × 659,176.20
  4. Step 4: Simplify right side
    978,040.80x = 965,754,370,468.98
  5. Step 5: Solve for x
    x = 965,754,370,468.98/978,040.80
  6. Step 6: Final answer
    x = 987,437.71

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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.