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Finding the Fourth Proportional to 459.60, 689.32 and 134.90

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Solution

The fourth proportional to 459.60, 689.32 and 134.90 is: 202.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.60 : 689.32 = 134.90 : x
  2. Step 2: Convert to fraction form
    459.60/689.32 = 134.90/x
  3. Step 3: Cross multiply
    459.60x = 689.32 × 134.90
  4. Step 4: Simplify right side
    459.60x = 92,989.27
  5. Step 5: Solve for x
    x = 92,989.27/459.60
  6. Step 6: Final answer
    x = 202.33

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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.