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Finding the Fourth Proportional to 940.06, 1,297.25 and 520.43

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Solution

The fourth proportional to 940.06, 1,297.25 and 520.43 is: 718.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.06 : 1,297.25 = 520.43 : x
  2. Step 2: Convert to fraction form
    940.06/1,297.25 = 520.43/x
  3. Step 3: Cross multiply
    940.06x = 1,297.25 × 520.43
  4. Step 4: Simplify right side
    940.06x = 675,127.82
  5. Step 5: Solve for x
    x = 675,127.82/940.06
  6. Step 6: Final answer
    x = 718.18

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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.