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Finding the Fourth Proportional to 669.94, 1,004.59 and 279.88

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Solution

The fourth proportional to 669.94, 1,004.59 and 279.88 is: 419.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.94 : 1,004.59 = 279.88 : x
  2. Step 2: Convert to fraction form
    669.94/1,004.59 = 279.88/x
  3. Step 3: Cross multiply
    669.94x = 1,004.59 × 279.88
  4. Step 4: Simplify right side
    669.94x = 281,164.65
  5. Step 5: Solve for x
    x = 281,164.65/669.94
  6. Step 6: Final answer
    x = 419.69

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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.