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Finding the Fourth Proportional to 889.92, 1,226.88 and 760.32

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Solution

The fourth proportional to 889.92, 1,226.88 and 760.32 is: 1,048.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.92 : 1,226.88 = 760.32 : x
  2. Step 2: Convert to fraction form
    889.92/1,226.88 = 760.32/x
  3. Step 3: Cross multiply
    889.92x = 1,226.88 × 760.32
  4. Step 4: Simplify right side
    889.92x = 932,821.40
  5. Step 5: Solve for x
    x = 932,821.40/889.92
  6. Step 6: Final answer
    x = 1,048.21

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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.