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Finding the Fourth Proportional to 845.53, 1,268.16 and 383.20

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Solution

The fourth proportional to 845.53, 1,268.16 and 383.20 is: 574.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.53 : 1,268.16 = 383.20 : x
  2. Step 2: Convert to fraction form
    845.53/1,268.16 = 383.20/x
  3. Step 3: Cross multiply
    845.53x = 1,268.16 × 383.20
  4. Step 4: Simplify right side
    845.53x = 485,958.91
  5. Step 5: Solve for x
    x = 485,958.91/845.53
  6. Step 6: Final answer
    x = 574.74

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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.