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Finding the Fourth Proportional to 761.36, 1,141.32 and 545

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Solution

The fourth proportional to 761.36, 1,141.32 and 545 is: 816.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.36 : 1,141.32 = 545 : x
  2. Step 2: Convert to fraction form
    761.36/1,141.32 = 545/x
  3. Step 3: Cross multiply
    761.36x = 1,141.32 × 545
  4. Step 4: Simplify right side
    761.36x = 622,019.40
  5. Step 5: Solve for x
    x = 622,019.40/761.36
  6. Step 6: Final answer
    x = 816.98

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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.