Home / 4,989.80-7,475.70-2,908.10

Finding the Fourth Proportional to 4,989.80, 7,475.70 and 2,908.10

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Solution

The fourth proportional to 4,989.80, 7,475.70 and 2,908.10 is: 4,356.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.80 : 7,475.70 = 2,908.10 : x
  2. Step 2: Convert to fraction form
    4,989.80/7,475.70 = 2,908.10/x
  3. Step 3: Cross multiply
    4,989.80x = 7,475.70 × 2,908.10
  4. Step 4: Simplify right side
    4,989.80x = 21,740,083.17
  5. Step 5: Solve for x
    x = 21,740,083.17/4,989.80
  6. Step 6: Final answer
    x = 4,356.90

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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.