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Finding the Fourth Proportional to 499.32, 689.02 and 275.24

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Solution

The fourth proportional to 499.32, 689.02 and 275.24 is: 379.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.32 : 689.02 = 275.24 : x
  2. Step 2: Convert to fraction form
    499.32/689.02 = 275.24/x
  3. Step 3: Cross multiply
    499.32x = 689.02 × 275.24
  4. Step 4: Simplify right side
    499.32x = 189,645.86
  5. Step 5: Solve for x
    x = 189,645.86/499.32
  6. Step 6: Final answer
    x = 379.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.