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Finding the Fourth Proportional to 418.90, 577.68 and 377.89

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Solution

The fourth proportional to 418.90, 577.68 and 377.89 is: 521.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.90 : 577.68 = 377.89 : x
  2. Step 2: Convert to fraction form
    418.90/577.68 = 377.89/x
  3. Step 3: Cross multiply
    418.90x = 577.68 × 377.89
  4. Step 4: Simplify right side
    418.90x = 218,299.50
  5. Step 5: Solve for x
    x = 218,299.50/418.90
  6. Step 6: Final answer
    x = 521.13

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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.