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Finding the Fourth Proportional to 730.51, 1,008.11 and 398.94

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Solution

The fourth proportional to 730.51, 1,008.11 and 398.94 is: 550.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.51 : 1,008.11 = 398.94 : x
  2. Step 2: Convert to fraction form
    730.51/1,008.11 = 398.94/x
  3. Step 3: Cross multiply
    730.51x = 1,008.11 × 398.94
  4. Step 4: Simplify right side
    730.51x = 402,175.40
  5. Step 5: Solve for x
    x = 402,175.40/730.51
  6. Step 6: Final answer
    x = 550.54

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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.