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Finding the Fourth Proportional to 940.30, 1,297.58 and 547.54

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Solution

The fourth proportional to 940.30, 1,297.58 and 547.54 is: 755.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.30 : 1,297.58 = 547.54 : x
  2. Step 2: Convert to fraction form
    940.30/1,297.58 = 547.54/x
  3. Step 3: Cross multiply
    940.30x = 1,297.58 × 547.54
  4. Step 4: Simplify right side
    940.30x = 710,470.47
  5. Step 5: Solve for x
    x = 710,470.47/940.30
  6. Step 6: Final answer
    x = 755.58

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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.