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Finding the Fourth Proportional to 1,011.85, 1,517.47 and 395.41

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Solution

The fourth proportional to 1,011.85, 1,517.47 and 395.41 is: 593.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.85 : 1,517.47 = 395.41 : x
  2. Step 2: Convert to fraction form
    1,011.85/1,517.47 = 395.41/x
  3. Step 3: Cross multiply
    1,011.85x = 1,517.47 × 395.41
  4. Step 4: Simplify right side
    1,011.85x = 600,022.81
  5. Step 5: Solve for x
    x = 600,022.81/1,011.85
  6. Step 6: Final answer
    x = 593.00

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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.