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Finding the Fourth Proportional to 543.18, 814.99 and 348.40

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Solution

The fourth proportional to 543.18, 814.99 and 348.40 is: 522.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.18 : 814.99 = 348.40 : x
  2. Step 2: Convert to fraction form
    543.18/814.99 = 348.40/x
  3. Step 3: Cross multiply
    543.18x = 814.99 × 348.40
  4. Step 4: Simplify right side
    543.18x = 283,942.52
  5. Step 5: Solve for x
    x = 283,942.52/543.18
  6. Step 6: Final answer
    x = 522.74

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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.