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Finding the Fourth Proportional to 746.33, 1,120.07 and 511.51

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Solution

The fourth proportional to 746.33, 1,120.07 and 511.51 is: 767.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.33 : 1,120.07 = 511.51 : x
  2. Step 2: Convert to fraction form
    746.33/1,120.07 = 511.51/x
  3. Step 3: Cross multiply
    746.33x = 1,120.07 × 511.51
  4. Step 4: Simplify right side
    746.33x = 572,927.01
  5. Step 5: Solve for x
    x = 572,927.01/746.33
  6. Step 6: Final answer
    x = 767.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.