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Finding the Fourth Proportional to 749.09, 1,033.83 and 438.59

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Solution

The fourth proportional to 749.09, 1,033.83 and 438.59 is: 605.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.09 : 1,033.83 = 438.59 : x
  2. Step 2: Convert to fraction form
    749.09/1,033.83 = 438.59/x
  3. Step 3: Cross multiply
    749.09x = 1,033.83 × 438.59
  4. Step 4: Simplify right side
    749.09x = 453,427.50
  5. Step 5: Solve for x
    x = 453,427.50/749.09
  6. Step 6: Final answer
    x = 605.30

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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.