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Finding the Fourth Proportional to 620.64, 854.34 and 536.58

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Solution

The fourth proportional to 620.64, 854.34 and 536.58 is: 738.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.64 : 854.34 = 536.58 : x
  2. Step 2: Convert to fraction form
    620.64/854.34 = 536.58/x
  3. Step 3: Cross multiply
    620.64x = 854.34 × 536.58
  4. Step 4: Simplify right side
    620.64x = 458,419.75
  5. Step 5: Solve for x
    x = 458,419.75/620.64
  6. Step 6: Final answer
    x = 738.62

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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.