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Finding the Fourth Proportional to 943.05, 1,301.54 and 785.45

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Solution

The fourth proportional to 943.05, 1,301.54 and 785.45 is: 1,084.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.05 : 1,301.54 = 785.45 : x
  2. Step 2: Convert to fraction form
    943.05/1,301.54 = 785.45/x
  3. Step 3: Cross multiply
    943.05x = 1,301.54 × 785.45
  4. Step 4: Simplify right side
    943.05x = 1,022,299.81
  5. Step 5: Solve for x
    x = 1,022,299.81/943.05
  6. Step 6: Final answer
    x = 1,084.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.