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Finding the Fourth Proportional to 1,518.72, 2,094.93 and 987.36

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Solution

The fourth proportional to 1,518.72, 2,094.93 and 987.36 is: 1,361.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.72 : 2,094.93 = 987.36 : x
  2. Step 2: Convert to fraction form
    1,518.72/2,094.93 = 987.36/x
  3. Step 3: Cross multiply
    1,518.72x = 2,094.93 × 987.36
  4. Step 4: Simplify right side
    1,518.72x = 2,068,450.08
  5. Step 5: Solve for x
    x = 2,068,450.08/1,518.72
  6. Step 6: Final answer
    x = 1,361.97

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1.5x scale

Why These Related Problems?

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