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Finding the Fourth Proportional to 739.53, 1,020.42 and 459.54

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Solution

The fourth proportional to 739.53, 1,020.42 and 459.54 is: 634.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.53 : 1,020.42 = 459.54 : x
  2. Step 2: Convert to fraction form
    739.53/1,020.42 = 459.54/x
  3. Step 3: Cross multiply
    739.53x = 1,020.42 × 459.54
  4. Step 4: Simplify right side
    739.53x = 468,923.81
  5. Step 5: Solve for x
    x = 468,923.81/739.53
  6. Step 6: Final answer
    x = 634.08

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1.5x scale

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.