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Finding the Fourth Proportional to 459.30, 689.07 and 151.20

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Solution

The fourth proportional to 459.30, 689.07 and 151.20 is: 226.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.30 : 689.07 = 151.20 : x
  2. Step 2: Convert to fraction form
    459.30/689.07 = 151.20/x
  3. Step 3: Cross multiply
    459.30x = 689.07 × 151.20
  4. Step 4: Simplify right side
    459.30x = 104,187.38
  5. Step 5: Solve for x
    x = 104,187.38/459.30
  6. Step 6: Final answer
    x = 226.84

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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.