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Finding the Fourth Proportional to 485.21, 727.63 and 160.50

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Solution

The fourth proportional to 485.21, 727.63 and 160.50 is: 240.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.21 : 727.63 = 160.50 : x
  2. Step 2: Convert to fraction form
    485.21/727.63 = 160.50/x
  3. Step 3: Cross multiply
    485.21x = 727.63 × 160.50
  4. Step 4: Simplify right side
    485.21x = 116,784.62
  5. Step 5: Solve for x
    x = 116,784.62/485.21
  6. Step 6: Final answer
    x = 240.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.