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Finding the Fourth Proportional to 790.44, 1,089.96 and 603.96

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Solution

The fourth proportional to 790.44, 1,089.96 and 603.96 is: 832.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.44 : 1,089.96 = 603.96 : x
  2. Step 2: Convert to fraction form
    790.44/1,089.96 = 603.96/x
  3. Step 3: Cross multiply
    790.44x = 1,089.96 × 603.96
  4. Step 4: Simplify right side
    790.44x = 658,292.24
  5. Step 5: Solve for x
    x = 658,292.24/790.44
  6. Step 6: Final answer
    x = 832.82

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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.