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Finding the Fourth Proportional to 543.81, 817.62 and 436.35

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Solution

The fourth proportional to 543.81, 817.62 and 436.35 is: 656.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.81 : 817.62 = 436.35 : x
  2. Step 2: Convert to fraction form
    543.81/817.62 = 436.35/x
  3. Step 3: Cross multiply
    543.81x = 817.62 × 436.35
  4. Step 4: Simplify right side
    543.81x = 356,768.49
  5. Step 5: Solve for x
    x = 356,768.49/543.81
  6. Step 6: Final answer
    x = 656.05

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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.