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Finding the Fourth Proportional to 745.20, 1,116 and 471.36

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Solution

The fourth proportional to 745.20, 1,116 and 471.36 is: 705.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.20 : 1,116 = 471.36 : x
  2. Step 2: Convert to fraction form
    745.20/1,116 = 471.36/x
  3. Step 3: Cross multiply
    745.20x = 1,116 × 471.36
  4. Step 4: Simplify right side
    745.20x = 526,037.76
  5. Step 5: Solve for x
    x = 526,037.76/745.20
  6. Step 6: Final answer
    x = 705.90

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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.