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Finding the Fourth Proportional to 885.50, 1,220.94 and 605.87

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Solution

The fourth proportional to 885.50, 1,220.94 and 605.87 is: 835.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.50 : 1,220.94 = 605.87 : x
  2. Step 2: Convert to fraction form
    885.50/1,220.94 = 605.87/x
  3. Step 3: Cross multiply
    885.50x = 1,220.94 × 605.87
  4. Step 4: Simplify right side
    885.50x = 739,724.81
  5. Step 5: Solve for x
    x = 739,724.81/885.50
  6. Step 6: Final answer
    x = 835.38

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Double scale
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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.