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Finding the Fourth Proportional to 471.89, 707.84 and 279.38

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Solution

The fourth proportional to 471.89, 707.84 and 279.38 is: 419.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.89 : 707.84 = 279.38 : x
  2. Step 2: Convert to fraction form
    471.89/707.84 = 279.38/x
  3. Step 3: Cross multiply
    471.89x = 707.84 × 279.38
  4. Step 4: Simplify right side
    471.89x = 197,751.40
  5. Step 5: Solve for x
    x = 197,751.40/471.89
  6. Step 6: Final answer
    x = 419.07

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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.