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Finding the Fourth Proportional to 661.04, 991.72 and 352.63

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Solution

The fourth proportional to 661.04, 991.72 and 352.63 is: 529.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.04 : 991.72 = 352.63 : x
  2. Step 2: Convert to fraction form
    661.04/991.72 = 352.63/x
  3. Step 3: Cross multiply
    661.04x = 991.72 × 352.63
  4. Step 4: Simplify right side
    661.04x = 349,716.63
  5. Step 5: Solve for x
    x = 349,716.63/661.04
  6. Step 6: Final answer
    x = 529.04

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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.