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Finding the Fourth Proportional to 669.84, 1,004.88 and 237.60

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Solution

The fourth proportional to 669.84, 1,004.88 and 237.60 is: 356.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.84 : 1,004.88 = 237.60 : x
  2. Step 2: Convert to fraction form
    669.84/1,004.88 = 237.60/x
  3. Step 3: Cross multiply
    669.84x = 1,004.88 × 237.60
  4. Step 4: Simplify right side
    669.84x = 238,759.49
  5. Step 5: Solve for x
    x = 238,759.49/669.84
  6. Step 6: Final answer
    x = 356.44

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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.