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Finding the Fourth Proportional to 535.79, 803.61 and 445.07

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Solution

The fourth proportional to 535.79, 803.61 and 445.07 is: 667.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.79 : 803.61 = 445.07 : x
  2. Step 2: Convert to fraction form
    535.79/803.61 = 445.07/x
  3. Step 3: Cross multiply
    535.79x = 803.61 × 445.07
  4. Step 4: Simplify right side
    535.79x = 357,660.48
  5. Step 5: Solve for x
    x = 357,660.48/535.79
  6. Step 6: Final answer
    x = 667.54

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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.