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Finding the Fourth Proportional to 2,424.80, 3,636.76 and 693

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Solution

The fourth proportional to 2,424.80, 3,636.76 and 693 is: 1,039.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,424.80 : 3,636.76 = 693 : x
  2. Step 2: Convert to fraction form
    2,424.80/3,636.76 = 693/x
  3. Step 3: Cross multiply
    2,424.80x = 3,636.76 × 693
  4. Step 4: Simplify right side
    2,424.80x = 2,520,274.68
  5. Step 5: Solve for x
    x = 2,520,274.68/2,424.80
  6. Step 6: Final answer
    x = 1,039.37

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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.