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Finding the Fourth Proportional to 374.30, 515.97 and 291.26

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Solution

The fourth proportional to 374.30, 515.97 and 291.26 is: 401.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.30 : 515.97 = 291.26 : x
  2. Step 2: Convert to fraction form
    374.30/515.97 = 291.26/x
  3. Step 3: Cross multiply
    374.30x = 515.97 × 291.26
  4. Step 4: Simplify right side
    374.30x = 150,281.42
  5. Step 5: Solve for x
    x = 150,281.42/374.30
  6. Step 6: Final answer
    x = 401.50

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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.