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Finding the Fourth Proportional to 777.60, 1,165.38 and 366.18

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Solution

The fourth proportional to 777.60, 1,165.38 and 366.18 is: 548.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.60 : 1,165.38 = 366.18 : x
  2. Step 2: Convert to fraction form
    777.60/1,165.38 = 366.18/x
  3. Step 3: Cross multiply
    777.60x = 1,165.38 × 366.18
  4. Step 4: Simplify right side
    777.60x = 426,733.11
  5. Step 5: Solve for x
    x = 426,733.11/777.60
  6. Step 6: Final answer
    x = 548.78

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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.