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Finding the Fourth Proportional to 960.61, 1,325.01 and 764.59

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Solution

The fourth proportional to 960.61, 1,325.01 and 764.59 is: 1,054.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.61 : 1,325.01 = 764.59 : x
  2. Step 2: Convert to fraction form
    960.61/1,325.01 = 764.59/x
  3. Step 3: Cross multiply
    960.61x = 1,325.01 × 764.59
  4. Step 4: Simplify right side
    960.61x = 1,013,089.40
  5. Step 5: Solve for x
    x = 1,013,089.40/960.61
  6. Step 6: Final answer
    x = 1,054.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.