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Finding the Fourth Proportional to 845.75, 1,268.28 and 260.62

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Solution

The fourth proportional to 845.75, 1,268.28 and 260.62 is: 390.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.75 : 1,268.28 = 260.62 : x
  2. Step 2: Convert to fraction form
    845.75/1,268.28 = 260.62/x
  3. Step 3: Cross multiply
    845.75x = 1,268.28 × 260.62
  4. Step 4: Simplify right side
    845.75x = 330,536.70
  5. Step 5: Solve for x
    x = 330,536.70/845.75
  6. Step 6: Final answer
    x = 390.82

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1.5x scale

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.