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Finding the Fourth Proportional to 485.14, 668.46 and 471.46

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Solution

The fourth proportional to 485.14, 668.46 and 471.46 is: 649.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.14 : 668.46 = 471.46 : x
  2. Step 2: Convert to fraction form
    485.14/668.46 = 471.46/x
  3. Step 3: Cross multiply
    485.14x = 668.46 × 471.46
  4. Step 4: Simplify right side
    485.14x = 315,152.15
  5. Step 5: Solve for x
    x = 315,152.15/485.14
  6. Step 6: Final answer
    x = 649.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.