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Finding the Fourth Proportional to 613.90, 921.15 and 467.60

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Solution

The fourth proportional to 613.90, 921.15 and 467.60 is: 701.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.90 : 921.15 = 467.60 : x
  2. Step 2: Convert to fraction form
    613.90/921.15 = 467.60/x
  3. Step 3: Cross multiply
    613.90x = 921.15 × 467.60
  4. Step 4: Simplify right side
    613.90x = 430,729.74
  5. Step 5: Solve for x
    x = 430,729.74/613.90
  6. Step 6: Final answer
    x = 701.63

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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.