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Finding the Fourth Proportional to 761.73, 1,143.03 and 322.95

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Solution

The fourth proportional to 761.73, 1,143.03 and 322.95 is: 484.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.73 : 1,143.03 = 322.95 : x
  2. Step 2: Convert to fraction form
    761.73/1,143.03 = 322.95/x
  3. Step 3: Cross multiply
    761.73x = 1,143.03 × 322.95
  4. Step 4: Simplify right side
    761.73x = 369,147.04
  5. Step 5: Solve for x
    x = 369,147.04/761.73
  6. Step 6: Final answer
    x = 484.62

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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.