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Finding the Fourth Proportional to 1,994.89, 2,987.77 and 955.62

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Solution

The fourth proportional to 1,994.89, 2,987.77 and 955.62 is: 1,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.89 : 2,987.77 = 955.62 : x
  2. Step 2: Convert to fraction form
    1,994.89/2,987.77 = 955.62/x
  3. Step 3: Cross multiply
    1,994.89x = 2,987.77 × 955.62
  4. Step 4: Simplify right side
    1,994.89x = 2,855,180.57
  5. Step 5: Solve for x
    x = 2,855,180.57/1,994.89
  6. Step 6: Final answer
    x = 1,431.25

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1.5x scale

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.