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Finding the Fourth Proportional to 459.65, 689.48 and 228.66

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Solution

The fourth proportional to 459.65, 689.48 and 228.66 is: 342.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.65 : 689.48 = 228.66 : x
  2. Step 2: Convert to fraction form
    459.65/689.48 = 228.66/x
  3. Step 3: Cross multiply
    459.65x = 689.48 × 228.66
  4. Step 4: Simplify right side
    459.65x = 157,653.63
  5. Step 5: Solve for x
    x = 157,653.63/459.65
  6. Step 6: Final answer
    x = 342.98

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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.