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Finding the Fourth Proportional to 789.59, 1,089.62 and 435.52

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Solution

The fourth proportional to 789.59, 1,089.62 and 435.52 is: 601.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.59 : 1,089.62 = 435.52 : x
  2. Step 2: Convert to fraction form
    789.59/1,089.62 = 435.52/x
  3. Step 3: Cross multiply
    789.59x = 1,089.62 × 435.52
  4. Step 4: Simplify right side
    789.59x = 474,551.30
  5. Step 5: Solve for x
    x = 474,551.30/789.59
  6. Step 6: Final answer
    x = 601.01

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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.