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Finding the Fourth Proportional to 461.02, 690.30 and 314.41

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Solution

The fourth proportional to 461.02, 690.30 and 314.41 is: 470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.02 : 690.30 = 314.41 : x
  2. Step 2: Convert to fraction form
    461.02/690.30 = 314.41/x
  3. Step 3: Cross multiply
    461.02x = 690.30 × 314.41
  4. Step 4: Simplify right side
    461.02x = 217,033.97
  5. Step 5: Solve for x
    x = 217,033.97/461.02
  6. Step 6: Final answer
    x = 470.77

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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.