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Finding the Fourth Proportional to 485.76, 671.04 and 348.48

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Solution

The fourth proportional to 485.76, 671.04 and 348.48 is: 481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.76 : 671.04 = 348.48 : x
  2. Step 2: Convert to fraction form
    485.76/671.04 = 348.48/x
  3. Step 3: Cross multiply
    485.76x = 671.04 × 348.48
  4. Step 4: Simplify right side
    485.76x = 233,844.02
  5. Step 5: Solve for x
    x = 233,844.02/485.76
  6. Step 6: Final answer
    x = 481.40

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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.