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Finding the Fourth Proportional to 789.83, 1,089.98 and 458.44

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Solution

The fourth proportional to 789.83, 1,089.98 and 458.44 is: 632.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.83 : 1,089.98 = 458.44 : x
  2. Step 2: Convert to fraction form
    789.83/1,089.98 = 458.44/x
  3. Step 3: Cross multiply
    789.83x = 1,089.98 × 458.44
  4. Step 4: Simplify right side
    789.83x = 499,690.43
  5. Step 5: Solve for x
    x = 499,690.43/789.83
  6. Step 6: Final answer
    x = 632.66

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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.