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Finding the Fourth Proportional to 1,368.90, 2,052.74 and 675.12

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Solution

The fourth proportional to 1,368.90, 2,052.74 and 675.12 is: 1,012.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.90 : 2,052.74 = 675.12 : x
  2. Step 2: Convert to fraction form
    1,368.90/2,052.74 = 675.12/x
  3. Step 3: Cross multiply
    1,368.90x = 2,052.74 × 675.12
  4. Step 4: Simplify right side
    1,368.90x = 1,385,845.83
  5. Step 5: Solve for x
    x = 1,385,845.83/1,368.90
  6. Step 6: Final answer
    x = 1,012.38

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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.