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Finding the Fourth Proportional to 919.39, 1,268.19 and 604.69

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Solution

The fourth proportional to 919.39, 1,268.19 and 604.69 is: 834.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.39 : 1,268.19 = 604.69 : x
  2. Step 2: Convert to fraction form
    919.39/1,268.19 = 604.69/x
  3. Step 3: Cross multiply
    919.39x = 1,268.19 × 604.69
  4. Step 4: Simplify right side
    919.39x = 766,861.81
  5. Step 5: Solve for x
    x = 766,861.81/919.39
  6. Step 6: Final answer
    x = 834.10

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.