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Finding the Fourth Proportional to 777.54, 1,068.20 and 695.73

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Solution

The fourth proportional to 777.54, 1,068.20 and 695.73 is: 955.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    777.54 : 1,068.20 = 695.73 : x
  2. Step 2: Convert to fraction form
    777.54/1,068.20 = 695.73/x
  3. Step 3: Cross multiply
    777.54x = 1,068.20 × 695.73
  4. Step 4: Simplify right side
    777.54x = 743,180.53
  5. Step 5: Solve for x
    x = 743,180.53/777.54
  6. Step 6: Final answer
    x = 955.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.