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Finding the Fourth Proportional to 1,362, 2,042.20 and 744.64

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Solution

The fourth proportional to 1,362, 2,042.20 and 744.64 is: 1,116.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362 : 2,042.20 = 744.64 : x
  2. Step 2: Convert to fraction form
    1,362/2,042.20 = 744.64/x
  3. Step 3: Cross multiply
    1,362x = 2,042.20 × 744.64
  4. Step 4: Simplify right side
    1,362x = 1,520,703.81
  5. Step 5: Solve for x
    x = 1,520,703.81/1,362
  6. Step 6: Final answer
    x = 1,116.52

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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.