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Finding the Fourth Proportional to 605.30, 907.88 and 258.62

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Solution

The fourth proportional to 605.30, 907.88 and 258.62 is: 387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.30 : 907.88 = 258.62 : x
  2. Step 2: Convert to fraction form
    605.30/907.88 = 258.62/x
  3. Step 3: Cross multiply
    605.30x = 907.88 × 258.62
  4. Step 4: Simplify right side
    605.30x = 234,795.93
  5. Step 5: Solve for x
    x = 234,795.93/605.30
  6. Step 6: Final answer
    x = 387.90

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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.