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Finding the Fourth Proportional to 538.85, 808.58 and 453.20

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Solution

The fourth proportional to 538.85, 808.58 and 453.20 is: 680.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.85 : 808.58 = 453.20 : x
  2. Step 2: Convert to fraction form
    538.85/808.58 = 453.20/x
  3. Step 3: Cross multiply
    538.85x = 808.58 × 453.20
  4. Step 4: Simplify right side
    538.85x = 366,445.55
  5. Step 5: Solve for x
    x = 366,445.55/538.85
  6. Step 6: Final answer
    x = 680.05

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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.