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Finding the Fourth Proportional to 889.15, 1,227.48 and 609.50

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Solution

The fourth proportional to 889.15, 1,227.48 and 609.50 is: 841.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.15 : 1,227.48 = 609.50 : x
  2. Step 2: Convert to fraction form
    889.15/1,227.48 = 609.50/x
  3. Step 3: Cross multiply
    889.15x = 1,227.48 × 609.50
  4. Step 4: Simplify right side
    889.15x = 748,149.06
  5. Step 5: Solve for x
    x = 748,149.06/889.15
  6. Step 6: Final answer
    x = 841.42

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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.