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Finding the Fourth Proportional to 689.03, 950.54 and 409.10

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Solution

The fourth proportional to 689.03, 950.54 and 409.10 is: 564.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.03 : 950.54 = 409.10 : x
  2. Step 2: Convert to fraction form
    689.03/950.54 = 409.10/x
  3. Step 3: Cross multiply
    689.03x = 950.54 × 409.10
  4. Step 4: Simplify right side
    689.03x = 388,859.12
  5. Step 5: Solve for x
    x = 388,859.12/689.03
  6. Step 6: Final answer
    x = 564.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.