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Finding the Fourth Proportional to 540.11, 808.90 and 417.98

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Solution

The fourth proportional to 540.11, 808.90 and 417.98 is: 625.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.11 : 808.90 = 417.98 : x
  2. Step 2: Convert to fraction form
    540.11/808.90 = 417.98/x
  3. Step 3: Cross multiply
    540.11x = 808.90 × 417.98
  4. Step 4: Simplify right side
    540.11x = 338,098.93
  5. Step 5: Solve for x
    x = 338,098.93/540.11
  6. Step 6: Final answer
    x = 625.99

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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.