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Finding the Fourth Proportional to 459.43, 689.14 and 253.88

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Solution

The fourth proportional to 459.43, 689.14 and 253.88 is: 380.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.43 : 689.14 = 253.88 : x
  2. Step 2: Convert to fraction form
    459.43/689.14 = 253.88/x
  3. Step 3: Cross multiply
    459.43x = 689.14 × 253.88
  4. Step 4: Simplify right side
    459.43x = 174,958.86
  5. Step 5: Solve for x
    x = 174,958.86/459.43
  6. Step 6: Final answer
    x = 380.82

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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.