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Finding the Fourth Proportional to 543.64, 815.06 and 214.52

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Solution

The fourth proportional to 543.64, 815.06 and 214.52 is: 321.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.64 : 815.06 = 214.52 : x
  2. Step 2: Convert to fraction form
    543.64/815.06 = 214.52/x
  3. Step 3: Cross multiply
    543.64x = 815.06 × 214.52
  4. Step 4: Simplify right side
    543.64x = 174,846.67
  5. Step 5: Solve for x
    x = 174,846.67/543.64
  6. Step 6: Final answer
    x = 321.62

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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.