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Finding the Fourth Proportional to 1,368, 1,887.84 and 816

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Solution

The fourth proportional to 1,368, 1,887.84 and 816 is: 1,126.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368 : 1,887.84 = 816 : x
  2. Step 2: Convert to fraction form
    1,368/1,887.84 = 816/x
  3. Step 3: Cross multiply
    1,368x = 1,887.84 × 816
  4. Step 4: Simplify right side
    1,368x = 1,540,477.44
  5. Step 5: Solve for x
    x = 1,540,477.44/1,368
  6. Step 6: Final answer
    x = 1,126.08

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.