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Finding the Fourth Proportional to 905.50, 1,355.43 and 630.22

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Solution

The fourth proportional to 905.50, 1,355.43 and 630.22 is: 943.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.50 : 1,355.43 = 630.22 : x
  2. Step 2: Convert to fraction form
    905.50/1,355.43 = 630.22/x
  3. Step 3: Cross multiply
    905.50x = 1,355.43 × 630.22
  4. Step 4: Simplify right side
    905.50x = 854,219.09
  5. Step 5: Solve for x
    x = 854,219.09/905.50
  6. Step 6: Final answer
    x = 943.37

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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.