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Finding the Fourth Proportional to 801.80, 1,203.05 and 436.04

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Solution

The fourth proportional to 801.80, 1,203.05 and 436.04 is: 654.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.80 : 1,203.05 = 436.04 : x
  2. Step 2: Convert to fraction form
    801.80/1,203.05 = 436.04/x
  3. Step 3: Cross multiply
    801.80x = 1,203.05 × 436.04
  4. Step 4: Simplify right side
    801.80x = 524,571.91
  5. Step 5: Solve for x
    x = 524,571.91/801.80
  6. Step 6: Final answer
    x = 654.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.