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Finding the Fourth Proportional to 602.39, 902.80 and 309.65

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Solution

The fourth proportional to 602.39, 902.80 and 309.65 is: 464.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.39 : 902.80 = 309.65 : x
  2. Step 2: Convert to fraction form
    602.39/902.80 = 309.65/x
  3. Step 3: Cross multiply
    602.39x = 902.80 × 309.65
  4. Step 4: Simplify right side
    602.39x = 279,552.02
  5. Step 5: Solve for x
    x = 279,552.02/602.39
  6. Step 6: Final answer
    x = 464.07

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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.