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Finding the Fourth Proportional to 898.88, 1,336.72 and 889.28

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Solution

The fourth proportional to 898.88, 1,336.72 and 889.28 is: 1,322.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.88 : 1,336.72 = 889.28 : x
  2. Step 2: Convert to fraction form
    898.88/1,336.72 = 889.28/x
  3. Step 3: Cross multiply
    898.88x = 1,336.72 × 889.28
  4. Step 4: Simplify right side
    898.88x = 1,188,718.36
  5. Step 5: Solve for x
    x = 1,188,718.36/898.88
  6. Step 6: Final answer
    x = 1,322.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.