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Finding the Fourth Proportional to 777.03, 1,165.80 and 314.56

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Solution

The fourth proportional to 777.03, 1,165.80 and 314.56 is: 471.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.03 : 1,165.80 = 314.56 : x
  2. Step 2: Convert to fraction form
    777.03/1,165.80 = 314.56/x
  3. Step 3: Cross multiply
    777.03x = 1,165.80 × 314.56
  4. Step 4: Simplify right side
    777.03x = 366,708.22
  5. Step 5: Solve for x
    x = 366,708.22/777.03
  6. Step 6: Final answer
    x = 471.94

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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.