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Finding the Fourth Proportional to 763.81, 1,146.19 and 301.51

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Solution

The fourth proportional to 763.81, 1,146.19 and 301.51 is: 452.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.81 : 1,146.19 = 301.51 : x
  2. Step 2: Convert to fraction form
    763.81/1,146.19 = 301.51/x
  3. Step 3: Cross multiply
    763.81x = 1,146.19 × 301.51
  4. Step 4: Simplify right side
    763.81x = 345,586.24
  5. Step 5: Solve for x
    x = 345,586.24/763.81
  6. Step 6: Final answer
    x = 452.45

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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.