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Finding the Fourth Proportional to 2,465.60, 3,696 and 905.16

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Solution

The fourth proportional to 2,465.60, 3,696 and 905.16 is: 1,356.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,465.60 : 3,696 = 905.16 : x
  2. Step 2: Convert to fraction form
    2,465.60/3,696 = 905.16/x
  3. Step 3: Cross multiply
    2,465.60x = 3,696 × 905.16
  4. Step 4: Simplify right side
    2,465.60x = 3,345,471.36
  5. Step 5: Solve for x
    x = 3,345,471.36/2,465.60
  6. Step 6: Final answer
    x = 1,356.86

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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.