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Finding the Fourth Proportional to 1,082.10, 1,622.94 and 432.18

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Solution

The fourth proportional to 1,082.10, 1,622.94 and 432.18 is: 648.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.10 : 1,622.94 = 432.18 : x
  2. Step 2: Convert to fraction form
    1,082.10/1,622.94 = 432.18/x
  3. Step 3: Cross multiply
    1,082.10x = 1,622.94 × 432.18
  4. Step 4: Simplify right side
    1,082.10x = 701,402.21
  5. Step 5: Solve for x
    x = 701,402.21/1,082.10
  6. Step 6: Final answer
    x = 648.19

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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.