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Finding the Fourth Proportional to 641.35, 885.19 and 501.19

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Solution

The fourth proportional to 641.35, 885.19 and 501.19 is: 691.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.35 : 885.19 = 501.19 : x
  2. Step 2: Convert to fraction form
    641.35/885.19 = 501.19/x
  3. Step 3: Cross multiply
    641.35x = 885.19 × 501.19
  4. Step 4: Simplify right side
    641.35x = 443,642.78
  5. Step 5: Solve for x
    x = 443,642.78/641.35
  6. Step 6: Final answer
    x = 691.74

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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.