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Finding the Fourth Proportional to 3,509.94, 5,265 and 1,661.92

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Solution

The fourth proportional to 3,509.94, 5,265 and 1,661.92 is: 2,492.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,509.94 : 5,265 = 1,661.92 : x
  2. Step 2: Convert to fraction form
    3,509.94/5,265 = 1,661.92/x
  3. Step 3: Cross multiply
    3,509.94x = 5,265 × 1,661.92
  4. Step 4: Simplify right side
    3,509.94x = 8,750,008.80
  5. Step 5: Solve for x
    x = 8,750,008.80/3,509.94
  6. Step 6: Final answer
    x = 2,492.92

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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.