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Finding the Fourth Proportional to 1,082.15, 1,620.08 and 898.68

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Solution

The fourth proportional to 1,082.15, 1,620.08 and 898.68 is: 1,345.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.15 : 1,620.08 = 898.68 : x
  2. Step 2: Convert to fraction form
    1,082.15/1,620.08 = 898.68/x
  3. Step 3: Cross multiply
    1,082.15x = 1,620.08 × 898.68
  4. Step 4: Simplify right side
    1,082.15x = 1,455,933.49
  5. Step 5: Solve for x
    x = 1,455,933.49/1,082.15
  6. Step 6: Final answer
    x = 1,345.41

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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.