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Finding the Fourth Proportional to 374.90, 517.20 and 258.26

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Solution

The fourth proportional to 374.90, 517.20 and 258.26 is: 356.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.90 : 517.20 = 258.26 : x
  2. Step 2: Convert to fraction form
    374.90/517.20 = 258.26/x
  3. Step 3: Cross multiply
    374.90x = 517.20 × 258.26
  4. Step 4: Simplify right side
    374.90x = 133,572.07
  5. Step 5: Solve for x
    x = 133,572.07/374.90
  6. Step 6: Final answer
    x = 356.29

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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.