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Finding the Fourth Proportional to 641.79, 885.33 and 610.20

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Solution

The fourth proportional to 641.79, 885.33 and 610.20 is: 841.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.79 : 885.33 = 610.20 : x
  2. Step 2: Convert to fraction form
    641.79/885.33 = 610.20/x
  3. Step 3: Cross multiply
    641.79x = 885.33 × 610.20
  4. Step 4: Simplify right side
    641.79x = 540,228.37
  5. Step 5: Solve for x
    x = 540,228.37/641.79
  6. Step 6: Final answer
    x = 841.75

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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.