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Finding the Fourth Proportional to 605.18, 907.85 and 172.35

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Solution

The fourth proportional to 605.18, 907.85 and 172.35 is: 258.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.18 : 907.85 = 172.35 : x
  2. Step 2: Convert to fraction form
    605.18/907.85 = 172.35/x
  3. Step 3: Cross multiply
    605.18x = 907.85 × 172.35
  4. Step 4: Simplify right side
    605.18x = 156,468.38
  5. Step 5: Solve for x
    x = 156,468.38/605.18
  6. Step 6: Final answer
    x = 258.55

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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.