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Finding the Fourth Proportional to 737.36, 1,017.55 and 405.79

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Solution

The fourth proportional to 737.36, 1,017.55 and 405.79 is: 559.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.36 : 1,017.55 = 405.79 : x
  2. Step 2: Convert to fraction form
    737.36/1,017.55 = 405.79/x
  3. Step 3: Cross multiply
    737.36x = 1,017.55 × 405.79
  4. Step 4: Simplify right side
    737.36x = 412,911.61
  5. Step 5: Solve for x
    x = 412,911.61/737.36
  6. Step 6: Final answer
    x = 559.99

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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.