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Finding the Fourth Proportional to 885.00, 1,221.26 and 492.02

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Solution

The fourth proportional to 885.00, 1,221.26 and 492.02 is: 678.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.00 : 1,221.26 = 492.02 : x
  2. Step 2: Convert to fraction form
    885.00/1,221.26 = 492.02/x
  3. Step 3: Cross multiply
    885.00x = 1,221.26 × 492.02
  4. Step 4: Simplify right side
    885.00x = 600,880.36
  5. Step 5: Solve for x
    x = 600,880.36/885.00
  6. Step 6: Final answer
    x = 678.96

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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.