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Finding the Fourth Proportional to 691.99, 954.56 and 443.03

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Solution

The fourth proportional to 691.99, 954.56 and 443.03 is: 611.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.99 : 954.56 = 443.03 : x
  2. Step 2: Convert to fraction form
    691.99/954.56 = 443.03/x
  3. Step 3: Cross multiply
    691.99x = 954.56 × 443.03
  4. Step 4: Simplify right side
    691.99x = 422,895.05
  5. Step 5: Solve for x
    x = 422,895.05/691.99
  6. Step 6: Final answer
    x = 611.13

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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.