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Finding the Fourth Proportional to 845.82, 1,261.38 and 774.93

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Solution

The fourth proportional to 845.82, 1,261.38 and 774.93 is: 1,155.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.82 : 1,261.38 = 774.93 : x
  2. Step 2: Convert to fraction form
    845.82/1,261.38 = 774.93/x
  3. Step 3: Cross multiply
    845.82x = 1,261.38 × 774.93
  4. Step 4: Simplify right side
    845.82x = 977,481.20
  5. Step 5: Solve for x
    x = 977,481.20/845.82
  6. Step 6: Final answer
    x = 1,155.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.