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Finding the Fourth Proportional to 1,145.96, 1,719 and 324.32

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Solution

The fourth proportional to 1,145.96, 1,719 and 324.32 is: 486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.96 : 1,719 = 324.32 : x
  2. Step 2: Convert to fraction form
    1,145.96/1,719 = 324.32/x
  3. Step 3: Cross multiply
    1,145.96x = 1,719 × 324.32
  4. Step 4: Simplify right side
    1,145.96x = 557,506.08
  5. Step 5: Solve for x
    x = 557,506.08/1,145.96
  6. Step 6: Final answer
    x = 486.50

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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.