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Finding the Fourth Proportional to 764.49, 1,141.02 and 659.91

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Solution

The fourth proportional to 764.49, 1,141.02 and 659.91 is: 984.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.49 : 1,141.02 = 659.91 : x
  2. Step 2: Convert to fraction form
    764.49/1,141.02 = 659.91/x
  3. Step 3: Cross multiply
    764.49x = 1,141.02 × 659.91
  4. Step 4: Simplify right side
    764.49x = 752,970.51
  5. Step 5: Solve for x
    x = 752,970.51/764.49
  6. Step 6: Final answer
    x = 984.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.