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Finding the Fourth Proportional to 1,202.45, 1,802.24 and 986.45

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Solution

The fourth proportional to 1,202.45, 1,802.24 and 986.45 is: 1,478.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.45 : 1,802.24 = 986.45 : x
  2. Step 2: Convert to fraction form
    1,202.45/1,802.24 = 986.45/x
  3. Step 3: Cross multiply
    1,202.45x = 1,802.24 × 986.45
  4. Step 4: Simplify right side
    1,202.45x = 1,777,814.72
  5. Step 5: Solve for x
    x = 1,777,814.72/1,202.45
  6. Step 6: Final answer
    x = 1,478.49

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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.