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Finding the Fourth Proportional to 746.44, 1,119.81 and 259.51

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Solution

The fourth proportional to 746.44, 1,119.81 and 259.51 is: 389.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.44 : 1,119.81 = 259.51 : x
  2. Step 2: Convert to fraction form
    746.44/1,119.81 = 259.51/x
  3. Step 3: Cross multiply
    746.44x = 1,119.81 × 259.51
  4. Step 4: Simplify right side
    746.44x = 290,601.89
  5. Step 5: Solve for x
    x = 290,601.89/746.44
  6. Step 6: Final answer
    x = 389.32

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1.5x scale

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.