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Finding the Fourth Proportional to 621.10, 930.15 and 360.28

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Solution

The fourth proportional to 621.10, 930.15 and 360.28 is: 539.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.10 : 930.15 = 360.28 : x
  2. Step 2: Convert to fraction form
    621.10/930.15 = 360.28/x
  3. Step 3: Cross multiply
    621.10x = 930.15 × 360.28
  4. Step 4: Simplify right side
    621.10x = 335,114.44
  5. Step 5: Solve for x
    x = 335,114.44/621.10
  6. Step 6: Final answer
    x = 539.55

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1.5x scale

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.