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Finding the Fourth Proportional to 488.78, 674.64 and 302.44

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Solution

The fourth proportional to 488.78, 674.64 and 302.44 is: 417.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.78 : 674.64 = 302.44 : x
  2. Step 2: Convert to fraction form
    488.78/674.64 = 302.44/x
  3. Step 3: Cross multiply
    488.78x = 674.64 × 302.44
  4. Step 4: Simplify right side
    488.78x = 204,038.12
  5. Step 5: Solve for x
    x = 204,038.12/488.78
  6. Step 6: Final answer
    x = 417.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.