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Finding the Fourth Proportional to 940.09, 1,297.35 and 520.48

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Solution

The fourth proportional to 940.09, 1,297.35 and 520.48 is: 718.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.09 : 1,297.35 = 520.48 : x
  2. Step 2: Convert to fraction form
    940.09/1,297.35 = 520.48/x
  3. Step 3: Cross multiply
    940.09x = 1,297.35 × 520.48
  4. Step 4: Simplify right side
    940.09x = 675,244.73
  5. Step 5: Solve for x
    x = 675,244.73/940.09
  6. Step 6: Final answer
    x = 718.28

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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.