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Finding the Fourth Proportional to 1,994.90, 2,992.01 and 534.20

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Solution

The fourth proportional to 1,994.90, 2,992.01 and 534.20 is: 801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.90 : 2,992.01 = 534.20 : x
  2. Step 2: Convert to fraction form
    1,994.90/2,992.01 = 534.20/x
  3. Step 3: Cross multiply
    1,994.90x = 2,992.01 × 534.20
  4. Step 4: Simplify right side
    1,994.90x = 1,598,314.11
  5. Step 5: Solve for x
    x = 1,598,314.11/1,994.90
  6. Step 6: Final answer
    x = 801.20

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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.