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Finding the Fourth Proportional to 889.61, 1,333.67 and 369.29

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Solution

The fourth proportional to 889.61, 1,333.67 and 369.29 is: 553.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.61 : 1,333.67 = 369.29 : x
  2. Step 2: Convert to fraction form
    889.61/1,333.67 = 369.29/x
  3. Step 3: Cross multiply
    889.61x = 1,333.67 × 369.29
  4. Step 4: Simplify right side
    889.61x = 492,502.48
  5. Step 5: Solve for x
    x = 492,502.48/889.61
  6. Step 6: Final answer
    x = 553.61

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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.