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Finding the Fourth Proportional to 803.11, 1,108.48 and 522.86

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Solution

The fourth proportional to 803.11, 1,108.48 and 522.86 is: 721.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.11 : 1,108.48 = 522.86 : x
  2. Step 2: Convert to fraction form
    803.11/1,108.48 = 522.86/x
  3. Step 3: Cross multiply
    803.11x = 1,108.48 × 522.86
  4. Step 4: Simplify right side
    803.11x = 579,581.69
  5. Step 5: Solve for x
    x = 579,581.69/803.11
  6. Step 6: Final answer
    x = 721.67

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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.