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Finding the Fourth Proportional to 459.89, 689.96 and 186.17

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Solution

The fourth proportional to 459.89, 689.96 and 186.17 is: 279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.89 : 689.96 = 186.17 : x
  2. Step 2: Convert to fraction form
    459.89/689.96 = 186.17/x
  3. Step 3: Cross multiply
    459.89x = 689.96 × 186.17
  4. Step 4: Simplify right side
    459.89x = 128,445.47
  5. Step 5: Solve for x
    x = 128,445.47/459.89
  6. Step 6: Final answer
    x = 279.30

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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.