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Finding the Fourth Proportional to 543.39, 815.69 and 300.51

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Solution

The fourth proportional to 543.39, 815.69 and 300.51 is: 451.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.39 : 815.69 = 300.51 : x
  2. Step 2: Convert to fraction form
    543.39/815.69 = 300.51/x
  3. Step 3: Cross multiply
    543.39x = 815.69 × 300.51
  4. Step 4: Simplify right side
    543.39x = 245,121.50
  5. Step 5: Solve for x
    x = 245,121.50/543.39
  6. Step 6: Final answer
    x = 451.10

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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.