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Finding the Fourth Proportional to 621.15, 930.60 and 295.80

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Solution

The fourth proportional to 621.15, 930.60 and 295.80 is: 443.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.15 : 930.60 = 295.80 : x
  2. Step 2: Convert to fraction form
    621.15/930.60 = 295.80/x
  3. Step 3: Cross multiply
    621.15x = 930.60 × 295.80
  4. Step 4: Simplify right side
    621.15x = 275,271.48
  5. Step 5: Solve for x
    x = 275,271.48/621.15
  6. Step 6: Final answer
    x = 443.16

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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.