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Finding the Fourth Proportional to 737.10, 1,017.21 and 405.56

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Solution

The fourth proportional to 737.10, 1,017.21 and 405.56 is: 559.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.10 : 1,017.21 = 405.56 : x
  2. Step 2: Convert to fraction form
    737.10/1,017.21 = 405.56/x
  3. Step 3: Cross multiply
    737.10x = 1,017.21 × 405.56
  4. Step 4: Simplify right side
    737.10x = 412,538.03
  5. Step 5: Solve for x
    x = 412,538.03/737.10
  6. Step 6: Final answer
    x = 559.68

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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.