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Finding the Fourth Proportional to 750, 1,035 and 455.21

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Solution

The fourth proportional to 750, 1,035 and 455.21 is: 628.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    750 : 1,035 = 455.21 : x
  2. Step 2: Convert to fraction form
    750/1,035 = 455.21/x
  3. Step 3: Cross multiply
    750x = 1,035 × 455.21
  4. Step 4: Simplify right side
    750x = 471,144.94
  5. Step 5: Solve for x
    x = 471,144.94/750
  6. Step 6: Final answer
    x = 628.19

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.