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Finding the Fourth Proportional to 973.51, 1,343.94 and 660.43

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Solution

The fourth proportional to 973.51, 1,343.94 and 660.43 is: 911.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.51 : 1,343.94 = 660.43 : x
  2. Step 2: Convert to fraction form
    973.51/1,343.94 = 660.43/x
  3. Step 3: Cross multiply
    973.51x = 1,343.94 × 660.43
  4. Step 4: Simplify right side
    973.51x = 887,578.29
  5. Step 5: Solve for x
    x = 887,578.29/973.51
  6. Step 6: Final answer
    x = 911.73

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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.