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Finding the Fourth Proportional to 761.04, 1,142.08 and 274.10

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Solution

The fourth proportional to 761.04, 1,142.08 and 274.10 is: 411.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.04 : 1,142.08 = 274.10 : x
  2. Step 2: Convert to fraction form
    761.04/1,142.08 = 274.10/x
  3. Step 3: Cross multiply
    761.04x = 1,142.08 × 274.10
  4. Step 4: Simplify right side
    761.04x = 313,044.13
  5. Step 5: Solve for x
    x = 313,044.13/761.04
  6. Step 6: Final answer
    x = 411.34

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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.