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Finding the Fourth Proportional to 690.56, 953.07 and 441.80

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Solution

The fourth proportional to 690.56, 953.07 and 441.80 is: 609.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.56 : 953.07 = 441.80 : x
  2. Step 2: Convert to fraction form
    690.56/953.07 = 441.80/x
  3. Step 3: Cross multiply
    690.56x = 953.07 × 441.80
  4. Step 4: Simplify right side
    690.56x = 421,066.33
  5. Step 5: Solve for x
    x = 421,066.33/690.56
  6. Step 6: Final answer
    x = 609.75

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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.