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Finding the Fourth Proportional to 485.34, 728.27 and 450.48

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Solution

The fourth proportional to 485.34, 728.27 and 450.48 is: 675.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.34 : 728.27 = 450.48 : x
  2. Step 2: Convert to fraction form
    485.34/728.27 = 450.48/x
  3. Step 3: Cross multiply
    485.34x = 728.27 × 450.48
  4. Step 4: Simplify right side
    485.34x = 328,071.67
  5. Step 5: Solve for x
    x = 328,071.67/485.34
  6. Step 6: Final answer
    x = 675.96

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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.