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Finding the Fourth Proportional to 536.68, 808.60 and 485.40

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Solution

The fourth proportional to 536.68, 808.60 and 485.40 is: 731.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.68 : 808.60 = 485.40 : x
  2. Step 2: Convert to fraction form
    536.68/808.60 = 485.40/x
  3. Step 3: Cross multiply
    536.68x = 808.60 × 485.40
  4. Step 4: Simplify right side
    536.68x = 392,494.44
  5. Step 5: Solve for x
    x = 392,494.44/536.68
  6. Step 6: Final answer
    x = 731.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.