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Finding the Fourth Proportional to 356.99, 535.68 and 140.72

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Solution

The fourth proportional to 356.99, 535.68 and 140.72 is: 211.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.99 : 535.68 = 140.72 : x
  2. Step 2: Convert to fraction form
    356.99/535.68 = 140.72/x
  3. Step 3: Cross multiply
    356.99x = 535.68 × 140.72
  4. Step 4: Simplify right side
    356.99x = 75,378.21
  5. Step 5: Solve for x
    x = 75,378.21/356.99
  6. Step 6: Final answer
    x = 211.15

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.