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Finding the Fourth Proportional to 3,225, 4,837.56 and 916.56

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Solution

The fourth proportional to 3,225, 4,837.56 and 916.56 is: 1,374.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,225 : 4,837.56 = 916.56 : x
  2. Step 2: Convert to fraction form
    3,225/4,837.56 = 916.56/x
  3. Step 3: Cross multiply
    3,225x = 4,837.56 × 916.56
  4. Step 4: Simplify right side
    3,225x = 4,433,913.99
  5. Step 5: Solve for x
    x = 4,433,913.99/3,225
  6. Step 6: Final answer
    x = 1,374.86

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Double scale
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Similar ratio
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1.5x scale

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.