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Finding the Fourth Proportional to 620.65, 929.62 and 403.30

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Solution

The fourth proportional to 620.65, 929.62 and 403.30 is: 604.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.65 : 929.62 = 403.30 : x
  2. Step 2: Convert to fraction form
    620.65/929.62 = 403.30/x
  3. Step 3: Cross multiply
    620.65x = 929.62 × 403.30
  4. Step 4: Simplify right side
    620.65x = 374,915.75
  5. Step 5: Solve for x
    x = 374,915.75/620.65
  6. Step 6: Final answer
    x = 604.07

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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.