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Finding the Fourth Proportional to 459.27, 689.13 and 228.15

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Solution

The fourth proportional to 459.27, 689.13 and 228.15 is: 342.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.27 : 689.13 = 228.15 : x
  2. Step 2: Convert to fraction form
    459.27/689.13 = 228.15/x
  3. Step 3: Cross multiply
    459.27x = 689.13 × 228.15
  4. Step 4: Simplify right side
    459.27x = 157,225.01
  5. Step 5: Solve for x
    x = 157,225.01/459.27
  6. Step 6: Final answer
    x = 342.34

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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.