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Finding the Fourth Proportional to 973.42, 1,343.30 and 553.80

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Solution

The fourth proportional to 973.42, 1,343.30 and 553.80 is: 764.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.42 : 1,343.30 = 553.80 : x
  2. Step 2: Convert to fraction form
    973.42/1,343.30 = 553.80/x
  3. Step 3: Cross multiply
    973.42x = 1,343.30 × 553.80
  4. Step 4: Simplify right side
    973.42x = 743,919.54
  5. Step 5: Solve for x
    x = 743,919.54/973.42
  6. Step 6: Final answer
    x = 764.23

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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.