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Finding the Fourth Proportional to 746.37, 1,028.67 and 711.74

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Solution

The fourth proportional to 746.37, 1,028.67 and 711.74 is: 980.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.37 : 1,028.67 = 711.74 : x
  2. Step 2: Convert to fraction form
    746.37/1,028.67 = 711.74/x
  3. Step 3: Cross multiply
    746.37x = 1,028.67 × 711.74
  4. Step 4: Simplify right side
    746.37x = 732,140.44
  5. Step 5: Solve for x
    x = 732,140.44/746.37
  6. Step 6: Final answer
    x = 980.93

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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.