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Finding the Fourth Proportional to 1,491.42, 2,236.95 and 395.87

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Solution

The fourth proportional to 1,491.42, 2,236.95 and 395.87 is: 593.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.42 : 2,236.95 = 395.87 : x
  2. Step 2: Convert to fraction form
    1,491.42/2,236.95 = 395.87/x
  3. Step 3: Cross multiply
    1,491.42x = 2,236.95 × 395.87
  4. Step 4: Simplify right side
    1,491.42x = 885,531.86
  5. Step 5: Solve for x
    x = 885,531.86/1,491.42
  6. Step 6: Final answer
    x = 593.75

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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.