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Finding the Fourth Proportional to 737.20, 1,017.28 and 405.58

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Solution

The fourth proportional to 737.20, 1,017.28 and 405.58 is: 559.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.20 : 1,017.28 = 405.58 : x
  2. Step 2: Convert to fraction form
    737.20/1,017.28 = 405.58/x
  3. Step 3: Cross multiply
    737.20x = 1,017.28 × 405.58
  4. Step 4: Simplify right side
    737.20x = 412,588.42
  5. Step 5: Solve for x
    x = 412,588.42/737.20
  6. Step 6: Final answer
    x = 559.67

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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.