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Finding the Fourth Proportional to 660.91, 991.38 and 370.27

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Solution

The fourth proportional to 660.91, 991.38 and 370.27 is: 555.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.91 : 991.38 = 370.27 : x
  2. Step 2: Convert to fraction form
    660.91/991.38 = 370.27/x
  3. Step 3: Cross multiply
    660.91x = 991.38 × 370.27
  4. Step 4: Simplify right side
    660.91x = 367,075.79
  5. Step 5: Solve for x
    x = 367,075.79/660.91
  6. Step 6: Final answer
    x = 555.41

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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.