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Finding the Fourth Proportional to 461.67, 689.25 and 418.62

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Solution

The fourth proportional to 461.67, 689.25 and 418.62 is: 624.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.67 : 689.25 = 418.62 : x
  2. Step 2: Convert to fraction form
    461.67/689.25 = 418.62/x
  3. Step 3: Cross multiply
    461.67x = 689.25 × 418.62
  4. Step 4: Simplify right side
    461.67x = 288,533.84
  5. Step 5: Solve for x
    x = 288,533.84/461.67
  6. Step 6: Final answer
    x = 624.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.