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Finding the Fourth Proportional to 641.12, 959.85 and 575.51

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Solution

The fourth proportional to 641.12, 959.85 and 575.51 is: 861.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.12 : 959.85 = 575.51 : x
  2. Step 2: Convert to fraction form
    641.12/959.85 = 575.51/x
  3. Step 3: Cross multiply
    641.12x = 959.85 × 575.51
  4. Step 4: Simplify right side
    641.12x = 552,398.47
  5. Step 5: Solve for x
    x = 552,398.47/641.12
  6. Step 6: Final answer
    x = 861.62

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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.