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Finding the Fourth Proportional to 620.95, 930 and 360.31

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Solution

The fourth proportional to 620.95, 930 and 360.31 is: 539.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.95 : 930 = 360.31 : x
  2. Step 2: Convert to fraction form
    620.95/930 = 360.31/x
  3. Step 3: Cross multiply
    620.95x = 930 × 360.31
  4. Step 4: Simplify right side
    620.95x = 335,088.30
  5. Step 5: Solve for x
    x = 335,088.30/620.95
  6. Step 6: Final answer
    x = 539.64

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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.