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Finding the Fourth Proportional to 620.52, 930.64 and 291.25

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Solution

The fourth proportional to 620.52, 930.64 and 291.25 is: 436.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.52 : 930.64 = 291.25 : x
  2. Step 2: Convert to fraction form
    620.52/930.64 = 291.25/x
  3. Step 3: Cross multiply
    620.52x = 930.64 × 291.25
  4. Step 4: Simplify right side
    620.52x = 271,048.90
  5. Step 5: Solve for x
    x = 271,048.90/620.52
  6. Step 6: Final answer
    x = 436.81

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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.