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Finding the Fourth Proportional to 620.61, 854.30 and 536.55

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Solution

The fourth proportional to 620.61, 854.30 and 536.55 is: 738.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.61 : 854.30 = 536.55 : x
  2. Step 2: Convert to fraction form
    620.61/854.30 = 536.55/x
  3. Step 3: Cross multiply
    620.61x = 854.30 × 536.55
  4. Step 4: Simplify right side
    620.61x = 458,367.71
  5. Step 5: Solve for x
    x = 458,367.71/620.61
  6. Step 6: Final answer
    x = 738.58

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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.