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Finding the Fourth Proportional to 940.92, 1,411.32 and 575.76

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Solution

The fourth proportional to 940.92, 1,411.32 and 575.76 is: 863.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.92 : 1,411.32 = 575.76 : x
  2. Step 2: Convert to fraction form
    940.92/1,411.32 = 575.76/x
  3. Step 3: Cross multiply
    940.92x = 1,411.32 × 575.76
  4. Step 4: Simplify right side
    940.92x = 812,581.60
  5. Step 5: Solve for x
    x = 812,581.60/940.92
  6. Step 6: Final answer
    x = 863.60

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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.