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Finding the Fourth Proportional to 4,409.64, 6,615 and 1,813.32

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Solution

The fourth proportional to 4,409.64, 6,615 and 1,813.32 is: 2,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,409.64 : 6,615 = 1,813.32 : x
  2. Step 2: Convert to fraction form
    4,409.64/6,615 = 1,813.32/x
  3. Step 3: Cross multiply
    4,409.64x = 6,615 × 1,813.32
  4. Step 4: Simplify right side
    4,409.64x = 11,995,111.80
  5. Step 5: Solve for x
    x = 11,995,111.80/4,409.64
  6. Step 6: Final answer
    x = 2,720.20

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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.