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Finding the Fourth Proportional to 801.43, 1,105.45 and 676.89

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Solution

The fourth proportional to 801.43, 1,105.45 and 676.89 is: 933.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.43 : 1,105.45 = 676.89 : x
  2. Step 2: Convert to fraction form
    801.43/1,105.45 = 676.89/x
  3. Step 3: Cross multiply
    801.43x = 1,105.45 × 676.89
  4. Step 4: Simplify right side
    801.43x = 748,266.36
  5. Step 5: Solve for x
    x = 748,266.36/801.43
  6. Step 6: Final answer
    x = 933.67

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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.