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Finding the Fourth Proportional to 669.53, 1,004.40 and 236.66

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Solution

The fourth proportional to 669.53, 1,004.40 and 236.66 is: 355.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.53 : 1,004.40 = 236.66 : x
  2. Step 2: Convert to fraction form
    669.53/1,004.40 = 236.66/x
  3. Step 3: Cross multiply
    669.53x = 1,004.40 × 236.66
  4. Step 4: Simplify right side
    669.53x = 237,696.28
  5. Step 5: Solve for x
    x = 237,696.28/669.53
  6. Step 6: Final answer
    x = 355.02

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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.