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Finding the Fourth Proportional to 973.45, 1,343.33 and 553.85

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Solution

The fourth proportional to 973.45, 1,343.33 and 553.85 is: 764.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    973.45 : 1,343.33 = 553.85 : x
  2. Step 2: Convert to fraction form
    973.45/1,343.33 = 553.85/x
  3. Step 3: Cross multiply
    973.45x = 1,343.33 × 553.85
  4. Step 4: Simplify right side
    973.45x = 743,993.83
  5. Step 5: Solve for x
    x = 743,993.83/973.45
  6. Step 6: Final answer
    x = 764.29

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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.