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Finding the Fourth Proportional to 1,697.34, 2,545.92 and 543

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Solution

The fourth proportional to 1,697.34, 2,545.92 and 543 is: 814.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,697.34 : 2,545.92 = 543 : x
  2. Step 2: Convert to fraction form
    1,697.34/2,545.92 = 543/x
  3. Step 3: Cross multiply
    1,697.34x = 2,545.92 × 543
  4. Step 4: Simplify right side
    1,697.34x = 1,382,434.56
  5. Step 5: Solve for x
    x = 1,382,434.56/1,697.34
  6. Step 6: Final answer
    x = 814.47

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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.