Home / 3,931.20-5,892.48-1,620

Finding the Fourth Proportional to 3,931.20, 5,892.48 and 1,620

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Solution

The fourth proportional to 3,931.20, 5,892.48 and 1,620 is: 2,428.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.20 : 5,892.48 = 1,620 : x
  2. Step 2: Convert to fraction form
    3,931.20/5,892.48 = 1,620/x
  3. Step 3: Cross multiply
    3,931.20x = 5,892.48 × 1,620
  4. Step 4: Simplify right side
    3,931.20x = 9,545,817.60
  5. Step 5: Solve for x
    x = 9,545,817.60/3,931.20
  6. Step 6: Final answer
    x = 2,428.22

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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.