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Finding the Fourth Proportional to 652,139.80, 978,209.70 and 547,163.80

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Solution

The fourth proportional to 652,139.80, 978,209.70 and 547,163.80 is: 820,745.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,139.80 : 978,209.70 = 547,163.80 : x
  2. Step 2: Convert to fraction form
    652,139.80/978,209.70 = 547,163.80/x
  3. Step 3: Cross multiply
    652,139.80x = 978,209.70 × 547,163.80
  4. Step 4: Simplify right side
    652,139.80x = 535,240,936,648.86
  5. Step 5: Solve for x
    x = 535,240,936,648.86/652,139.80
  6. Step 6: Final answer
    x = 820,745.70

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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.