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Finding the Fourth Proportional to 923.21, 1,272.30 and 713.01

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Solution

The fourth proportional to 923.21, 1,272.30 and 713.01 is: 982.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.21 : 1,272.30 = 713.01 : x
  2. Step 2: Convert to fraction form
    923.21/1,272.30 = 713.01/x
  3. Step 3: Cross multiply
    923.21x = 1,272.30 × 713.01
  4. Step 4: Simplify right side
    923.21x = 907,162.62
  5. Step 5: Solve for x
    x = 907,162.62/923.21
  6. Step 6: Final answer
    x = 982.62

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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.