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Finding the Fourth Proportional to 889.71, 1,336.05 and 670.34

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Solution

The fourth proportional to 889.71, 1,336.05 and 670.34 is: 1,006.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.71 : 1,336.05 = 670.34 : x
  2. Step 2: Convert to fraction form
    889.71/1,336.05 = 670.34/x
  3. Step 3: Cross multiply
    889.71x = 1,336.05 × 670.34
  4. Step 4: Simplify right side
    889.71x = 895,601.08
  5. Step 5: Solve for x
    x = 895,601.08/889.71
  6. Step 6: Final answer
    x = 1,006.62

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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.