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Finding the Fourth Proportional to 485.43, 670.02 and 352.71

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Solution

The fourth proportional to 485.43, 670.02 and 352.71 is: 486.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.43 : 670.02 = 352.71 : x
  2. Step 2: Convert to fraction form
    485.43/670.02 = 352.71/x
  3. Step 3: Cross multiply
    485.43x = 670.02 × 352.71
  4. Step 4: Simplify right side
    485.43x = 236,322.75
  5. Step 5: Solve for x
    x = 236,322.75/485.43
  6. Step 6: Final answer
    x = 486.83

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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.