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Finding the Fourth Proportional to 745.83, 1,028.90 and 451.06

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Solution

The fourth proportional to 745.83, 1,028.90 and 451.06 is: 622.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.83 : 1,028.90 = 451.06 : x
  2. Step 2: Convert to fraction form
    745.83/1,028.90 = 451.06/x
  3. Step 3: Cross multiply
    745.83x = 1,028.90 × 451.06
  4. Step 4: Simplify right side
    745.83x = 464,095.63
  5. Step 5: Solve for x
    x = 464,095.63/745.83
  6. Step 6: Final answer
    x = 622.25

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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.