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Finding the Fourth Proportional to 761.05, 1,143.71 and 452.95

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Solution

The fourth proportional to 761.05, 1,143.71 and 452.95 is: 680.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.05 : 1,143.71 = 452.95 : x
  2. Step 2: Convert to fraction form
    761.05/1,143.71 = 452.95/x
  3. Step 3: Cross multiply
    761.05x = 1,143.71 × 452.95
  4. Step 4: Simplify right side
    761.05x = 518,044.31
  5. Step 5: Solve for x
    x = 518,044.31/761.05
  6. Step 6: Final answer
    x = 680.70

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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.