Home / 2,399.12-3,598.68-918.80

Finding the Fourth Proportional to 2,399.12, 3,598.68 and 918.80

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Solution

The fourth proportional to 2,399.12, 3,598.68 and 918.80 is: 1,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,399.12 : 3,598.68 = 918.80 : x
  2. Step 2: Convert to fraction form
    2,399.12/3,598.68 = 918.80/x
  3. Step 3: Cross multiply
    2,399.12x = 3,598.68 × 918.80
  4. Step 4: Simplify right side
    2,399.12x = 3,306,467.18
  5. Step 5: Solve for x
    x = 3,306,467.18/2,399.12
  6. Step 6: Final answer
    x = 1,378.20

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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.