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Finding the Fourth Proportional to 620.76, 930.88 and 278.52

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Solution

The fourth proportional to 620.76, 930.88 and 278.52 is: 417.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.76 : 930.88 = 278.52 : x
  2. Step 2: Convert to fraction form
    620.76/930.88 = 278.52/x
  3. Step 3: Cross multiply
    620.76x = 930.88 × 278.52
  4. Step 4: Simplify right side
    620.76x = 259,268.70
  5. Step 5: Solve for x
    x = 259,268.70/620.76
  6. Step 6: Final answer
    x = 417.66

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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.