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Finding the Fourth Proportional to 3,618.92, 5,428.50 and 1,154

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Solution

The fourth proportional to 3,618.92, 5,428.50 and 1,154 is: 1,731.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.92 : 5,428.50 = 1,154 : x
  2. Step 2: Convert to fraction form
    3,618.92/5,428.50 = 1,154/x
  3. Step 3: Cross multiply
    3,618.92x = 5,428.50 × 1,154
  4. Step 4: Simplify right side
    3,618.92x = 6,264,489
  5. Step 5: Solve for x
    x = 6,264,489/3,618.92
  6. Step 6: Final answer
    x = 1,731.04

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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.