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Finding the Fourth Proportional to 790.54, 1,190.14 and 723.58

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Solution

The fourth proportional to 790.54, 1,190.14 and 723.58 is: 1,089.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.54 : 1,190.14 = 723.58 : x
  2. Step 2: Convert to fraction form
    790.54/1,190.14 = 723.58/x
  3. Step 3: Cross multiply
    790.54x = 1,190.14 × 723.58
  4. Step 4: Simplify right side
    790.54x = 861,161.50
  5. Step 5: Solve for x
    x = 861,161.50/790.54
  6. Step 6: Final answer
    x = 1,089.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.