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Finding the Fourth Proportional to 641.74, 885.55 and 376.18

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Solution

The fourth proportional to 641.74, 885.55 and 376.18 is: 519.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.74 : 885.55 = 376.18 : x
  2. Step 2: Convert to fraction form
    641.74/885.55 = 376.18/x
  3. Step 3: Cross multiply
    641.74x = 885.55 × 376.18
  4. Step 4: Simplify right side
    641.74x = 333,123.75
  5. Step 5: Solve for x
    x = 333,123.75/641.74
  6. Step 6: Final answer
    x = 519.10

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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.