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Finding the Fourth Proportional to 845.40, 1,268.01 and 434.37

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Solution

The fourth proportional to 845.40, 1,268.01 and 434.37 is: 651.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.40 : 1,268.01 = 434.37 : x
  2. Step 2: Convert to fraction form
    845.40/1,268.01 = 434.37/x
  3. Step 3: Cross multiply
    845.40x = 1,268.01 × 434.37
  4. Step 4: Simplify right side
    845.40x = 550,785.50
  5. Step 5: Solve for x
    x = 550,785.50/845.40
  6. Step 6: Final answer
    x = 651.51

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Double scale
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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.