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Finding the Fourth Proportional to 745.31, 1,116.34 and 359.75

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Solution

The fourth proportional to 745.31, 1,116.34 and 359.75 is: 538.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.31 : 1,116.34 = 359.75 : x
  2. Step 2: Convert to fraction form
    745.31/1,116.34 = 359.75/x
  3. Step 3: Cross multiply
    745.31x = 1,116.34 × 359.75
  4. Step 4: Simplify right side
    745.31x = 401,603.32
  5. Step 5: Solve for x
    x = 401,603.32/745.31
  6. Step 6: Final answer
    x = 538.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.