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Finding the Fourth Proportional to 1,938.48, 2,908.16 and 622.32

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Solution

The fourth proportional to 1,938.48, 2,908.16 and 622.32 is: 933.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.48 : 2,908.16 = 622.32 : x
  2. Step 2: Convert to fraction form
    1,938.48/2,908.16 = 622.32/x
  3. Step 3: Cross multiply
    1,938.48x = 2,908.16 × 622.32
  4. Step 4: Simplify right side
    1,938.48x = 1,809,806.13
  5. Step 5: Solve for x
    x = 1,809,806.13/1,938.48
  6. Step 6: Final answer
    x = 933.62

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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.