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Finding the Fourth Proportional to 730.93, 1,008.67 and 399.35

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Solution

The fourth proportional to 730.93, 1,008.67 and 399.35 is: 551.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.93 : 1,008.67 = 399.35 : x
  2. Step 2: Convert to fraction form
    730.93/1,008.67 = 399.35/x
  3. Step 3: Cross multiply
    730.93x = 1,008.67 × 399.35
  4. Step 4: Simplify right side
    730.93x = 402,805.32
  5. Step 5: Solve for x
    x = 402,805.32/730.93
  6. Step 6: Final answer
    x = 551.09

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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.