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Finding the Fourth Proportional to 987,747.40, 1,481,621.10 and 977,249.80

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Solution

The fourth proportional to 987,747.40, 1,481,621.10 and 977,249.80 is: 1,465,874.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,747.40 : 1,481,621.10 = 977,249.80 : x
  2. Step 2: Convert to fraction form
    987,747.40/1,481,621.10 = 977,249.80/x
  3. Step 3: Cross multiply
    987,747.40x = 1,481,621.10 × 977,249.80
  4. Step 4: Simplify right side
    987,747.40x = 1,447,913,923,650.78
  5. Step 5: Solve for x
    x = 1,447,913,923,650.78/987,747.40
  6. Step 6: Final answer
    x = 1,465,874.70

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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.