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Finding the Fourth Proportional to 983.70, 1,357.53 and 541.56

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Solution

The fourth proportional to 983.70, 1,357.53 and 541.56 is: 747.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.70 : 1,357.53 = 541.56 : x
  2. Step 2: Convert to fraction form
    983.70/1,357.53 = 541.56/x
  3. Step 3: Cross multiply
    983.70x = 1,357.53 × 541.56
  4. Step 4: Simplify right side
    983.70x = 735,183.95
  5. Step 5: Solve for x
    x = 735,183.95/983.70
  6. Step 6: Final answer
    x = 747.37

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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.