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Finding the Fourth Proportional to 757.98, 1,045.57 and 443.21

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Solution

The fourth proportional to 757.98, 1,045.57 and 443.21 is: 611.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.98 : 1,045.57 = 443.21 : x
  2. Step 2: Convert to fraction form
    757.98/1,045.57 = 443.21/x
  3. Step 3: Cross multiply
    757.98x = 1,045.57 × 443.21
  4. Step 4: Simplify right side
    757.98x = 463,407.08
  5. Step 5: Solve for x
    x = 463,407.08/757.98
  6. Step 6: Final answer
    x = 611.37

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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.