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Finding the Fourth Proportional to 3,658.39, 5,488.87 and 1,810.78

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Solution

The fourth proportional to 3,658.39, 5,488.87 and 1,810.78 is: 2,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,658.39 : 5,488.87 = 1,810.78 : x
  2. Step 2: Convert to fraction form
    3,658.39/5,488.87 = 1,810.78/x
  3. Step 3: Cross multiply
    3,658.39x = 5,488.87 × 1,810.78
  4. Step 4: Simplify right side
    3,658.39x = 9,939,108.57
  5. Step 5: Solve for x
    x = 9,939,108.57/3,658.39
  6. Step 6: Final answer
    x = 2,716.80

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1.5x scale

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.