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Finding the Fourth Proportional to 485.12, 668.76 and 368.48

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Solution

The fourth proportional to 485.12, 668.76 and 368.48 is: 507.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.12 : 668.76 = 368.48 : x
  2. Step 2: Convert to fraction form
    485.12/668.76 = 368.48/x
  3. Step 3: Cross multiply
    485.12x = 668.76 × 368.48
  4. Step 4: Simplify right side
    485.12x = 246,424.68
  5. Step 5: Solve for x
    x = 246,424.68/485.12
  6. Step 6: Final answer
    x = 507.97

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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.