Home / 2,409.18-3,613.20-1,109.40

Finding the Fourth Proportional to 2,409.18, 3,613.20 and 1,109.40

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Solution

The fourth proportional to 2,409.18, 3,613.20 and 1,109.40 is: 1,663.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,409.18 : 3,613.20 = 1,109.40 : x
  2. Step 2: Convert to fraction form
    2,409.18/3,613.20 = 1,109.40/x
  3. Step 3: Cross multiply
    2,409.18x = 3,613.20 × 1,109.40
  4. Step 4: Simplify right side
    2,409.18x = 4,008,484.08
  5. Step 5: Solve for x
    x = 4,008,484.08/2,409.18
  6. Step 6: Final answer
    x = 1,663.84

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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.