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Finding the Fourth Proportional to 745.64, 1,027.96 and 512.36

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Solution

The fourth proportional to 745.64, 1,027.96 and 512.36 is: 706.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.64 : 1,027.96 = 512.36 : x
  2. Step 2: Convert to fraction form
    745.64/1,027.96 = 512.36/x
  3. Step 3: Cross multiply
    745.64x = 1,027.96 × 512.36
  4. Step 4: Simplify right side
    745.64x = 526,685.59
  5. Step 5: Solve for x
    x = 526,685.59/745.64
  6. Step 6: Final answer
    x = 706.35

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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.