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Finding the Fourth Proportional to 543.60, 815.91 and 300.64

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Solution

The fourth proportional to 543.60, 815.91 and 300.64 is: 451.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.60 : 815.91 = 300.64 : x
  2. Step 2: Convert to fraction form
    543.60/815.91 = 300.64/x
  3. Step 3: Cross multiply
    543.60x = 815.91 × 300.64
  4. Step 4: Simplify right side
    543.60x = 245,295.18
  5. Step 5: Solve for x
    x = 245,295.18/543.60
  6. Step 6: Final answer
    x = 451.24

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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.