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Finding the Fourth Proportional to 757.81, 1,045.56 and 443.08

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Solution

The fourth proportional to 757.81, 1,045.56 and 443.08 is: 611.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.81 : 1,045.56 = 443.08 : x
  2. Step 2: Convert to fraction form
    757.81/1,045.56 = 443.08/x
  3. Step 3: Cross multiply
    757.81x = 1,045.56 × 443.08
  4. Step 4: Simplify right side
    757.81x = 463,266.72
  5. Step 5: Solve for x
    x = 463,266.72/757.81
  6. Step 6: Final answer
    x = 611.32

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Double scale
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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.