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Finding the Fourth Proportional to 745.76, 1,028.94 and 483.86

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Solution

The fourth proportional to 745.76, 1,028.94 and 483.86 is: 667.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.76 : 1,028.94 = 483.86 : x
  2. Step 2: Convert to fraction form
    745.76/1,028.94 = 483.86/x
  3. Step 3: Cross multiply
    745.76x = 1,028.94 × 483.86
  4. Step 4: Simplify right side
    745.76x = 497,862.91
  5. Step 5: Solve for x
    x = 497,862.91/745.76
  6. Step 6: Final answer
    x = 667.59

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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.