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Finding the Fourth Proportional to 485.13, 668.96 and 360.59

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Solution

The fourth proportional to 485.13, 668.96 and 360.59 is: 497.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.13 : 668.96 = 360.59 : x
  2. Step 2: Convert to fraction form
    485.13/668.96 = 360.59/x
  3. Step 3: Cross multiply
    485.13x = 668.96 × 360.59
  4. Step 4: Simplify right side
    485.13x = 241,217.84
  5. Step 5: Solve for x
    x = 241,217.84/485.13
  6. Step 6: Final answer
    x = 497.22

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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.