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Finding the Fourth Proportional to 3,658.67, 5,048.93 and 1,980.06

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Solution

The fourth proportional to 3,658.67, 5,048.93 and 1,980.06 is: 2,732.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,658.67 : 5,048.93 = 1,980.06 : x
  2. Step 2: Convert to fraction form
    3,658.67/5,048.93 = 1,980.06/x
  3. Step 3: Cross multiply
    3,658.67x = 5,048.93 × 1,980.06
  4. Step 4: Simplify right side
    3,658.67x = 9,997,177.45
  5. Step 5: Solve for x
    x = 9,997,177.45/3,658.67
  6. Step 6: Final answer
    x = 2,732.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.