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Finding the Fourth Proportional to 940.87, 1,411.41 and 324.51

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Solution

The fourth proportional to 940.87, 1,411.41 and 324.51 is: 486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.87 : 1,411.41 = 324.51 : x
  2. Step 2: Convert to fraction form
    940.87/1,411.41 = 324.51/x
  3. Step 3: Cross multiply
    940.87x = 1,411.41 × 324.51
  4. Step 4: Simplify right side
    940.87x = 458,010.76
  5. Step 5: Solve for x
    x = 458,010.76/940.87
  6. Step 6: Final answer
    x = 486.80

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Double scale
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Similar ratio
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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.