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Finding the Fourth Proportional to 489.48, 675.48 and 302.91

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Solution

The fourth proportional to 489.48, 675.48 and 302.91 is: 418.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.48 : 675.48 = 302.91 : x
  2. Step 2: Convert to fraction form
    489.48/675.48 = 302.91/x
  3. Step 3: Cross multiply
    489.48x = 675.48 × 302.91
  4. Step 4: Simplify right side
    489.48x = 204,609.65
  5. Step 5: Solve for x
    x = 204,609.65/489.48
  6. Step 6: Final answer
    x = 418.01

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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.