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Finding the Fourth Proportional to 777.17, 1,166.07 and 764.89

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Solution

The fourth proportional to 777.17, 1,166.07 and 764.89 is: 1,147.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.17 : 1,166.07 = 764.89 : x
  2. Step 2: Convert to fraction form
    777.17/1,166.07 = 764.89/x
  3. Step 3: Cross multiply
    777.17x = 1,166.07 × 764.89
  4. Step 4: Simplify right side
    777.17x = 891,915.28
  5. Step 5: Solve for x
    x = 891,915.28/777.17
  6. Step 6: Final answer
    x = 1,147.65

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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.