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Finding the Fourth Proportional to 912.44, 1,259.24 and 519.38

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Solution

The fourth proportional to 912.44, 1,259.24 and 519.38 is: 716.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.44 : 1,259.24 = 519.38 : x
  2. Step 2: Convert to fraction form
    912.44/1,259.24 = 519.38/x
  3. Step 3: Cross multiply
    912.44x = 1,259.24 × 519.38
  4. Step 4: Simplify right side
    912.44x = 654,015.18
  5. Step 5: Solve for x
    x = 654,015.18/912.44
  6. Step 6: Final answer
    x = 716.78

Related Problems

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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.