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Finding the Fourth Proportional to 943.21, 1,301.12 and 570.31

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Solution

The fourth proportional to 943.21, 1,301.12 and 570.31 is: 786.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.21 : 1,301.12 = 570.31 : x
  2. Step 2: Convert to fraction form
    943.21/1,301.12 = 570.31/x
  3. Step 3: Cross multiply
    943.21x = 1,301.12 × 570.31
  4. Step 4: Simplify right side
    943.21x = 742,035.58
  5. Step 5: Solve for x
    x = 742,035.58/943.21
  6. Step 6: Final answer
    x = 786.71

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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.