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Finding the Fourth Proportional to 543.22, 815.23 and 436.30

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Solution

The fourth proportional to 543.22, 815.23 and 436.30 is: 654.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.22 : 815.23 = 436.30 : x
  2. Step 2: Convert to fraction form
    543.22/815.23 = 436.30/x
  3. Step 3: Cross multiply
    543.22x = 815.23 × 436.30
  4. Step 4: Simplify right side
    543.22x = 355,683.36
  5. Step 5: Solve for x
    x = 355,683.36/543.22
  6. Step 6: Final answer
    x = 654.77

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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.