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Finding the Fourth Proportional to 665.79, 998.69 and 522.42

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Solution

The fourth proportional to 665.79, 998.69 and 522.42 is: 783.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.79 : 998.69 = 522.42 : x
  2. Step 2: Convert to fraction form
    665.79/998.69 = 522.42/x
  3. Step 3: Cross multiply
    665.79x = 998.69 × 522.42
  4. Step 4: Simplify right side
    665.79x = 521,733.02
  5. Step 5: Solve for x
    x = 521,733.02/665.79
  6. Step 6: Final answer
    x = 783.63

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.