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Finding the Fourth Proportional to 789.23, 1,089.06 and 435.11

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Solution

The fourth proportional to 789.23, 1,089.06 and 435.11 is: 600.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.23 : 1,089.06 = 435.11 : x
  2. Step 2: Convert to fraction form
    789.23/1,089.06 = 435.11/x
  3. Step 3: Cross multiply
    789.23x = 1,089.06 × 435.11
  4. Step 4: Simplify right side
    789.23x = 473,860.90
  5. Step 5: Solve for x
    x = 473,860.90/789.23
  6. Step 6: Final answer
    x = 600.41

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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.