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Finding the Fourth Proportional to 940.47, 1,297.89 and 547.53

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Solution

The fourth proportional to 940.47, 1,297.89 and 547.53 is: 755.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.47 : 1,297.89 = 547.53 : x
  2. Step 2: Convert to fraction form
    940.47/1,297.89 = 547.53/x
  3. Step 3: Cross multiply
    940.47x = 1,297.89 × 547.53
  4. Step 4: Simplify right side
    940.47x = 710,633.71
  5. Step 5: Solve for x
    x = 710,633.71/940.47
  6. Step 6: Final answer
    x = 755.62

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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.