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Finding the Fourth Proportional to 3,656, 5,484 and 920

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Solution

The fourth proportional to 3,656, 5,484 and 920 is: 1,380

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,656 : 5,484 = 920 : x
  2. Step 2: Convert to fraction form
    3,656/5,484 = 920/x
  3. Step 3: Cross multiply
    3,656x = 5,484 × 920
  4. Step 4: Simplify right side
    3,656x = 5,045,280
  5. Step 5: Solve for x
    x = 5,045,280/3,656
  6. Step 6: Final answer
    x = 1,380

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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.