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Finding the Fourth Proportional to 1,270.93, 1,906.58 and 393.51

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Solution

The fourth proportional to 1,270.93, 1,906.58 and 393.51 is: 590.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.93 : 1,906.58 = 393.51 : x
  2. Step 2: Convert to fraction form
    1,270.93/1,906.58 = 393.51/x
  3. Step 3: Cross multiply
    1,270.93x = 1,906.58 × 393.51
  4. Step 4: Simplify right side
    1,270.93x = 750,252.94
  5. Step 5: Solve for x
    x = 750,252.94/1,270.93
  6. Step 6: Final answer
    x = 590.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.