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Finding the Fourth Proportional to 942.23, 1,299.78 and 588.06

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Solution

The fourth proportional to 942.23, 1,299.78 and 588.06 is: 811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.23 : 1,299.78 = 588.06 : x
  2. Step 2: Convert to fraction form
    942.23/1,299.78 = 588.06/x
  3. Step 3: Cross multiply
    942.23x = 1,299.78 × 588.06
  4. Step 4: Simplify right side
    942.23x = 764,348.63
  5. Step 5: Solve for x
    x = 764,348.63/942.23
  6. Step 6: Final answer
    x = 811.21

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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.