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Finding the Fourth Proportional to 2,153.98, 2,971.44 and 1,407.97

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Solution

The fourth proportional to 2,153.98, 2,971.44 and 1,407.97 is: 1,942.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.98 : 2,971.44 = 1,407.97 : x
  2. Step 2: Convert to fraction form
    2,153.98/2,971.44 = 1,407.97/x
  3. Step 3: Cross multiply
    2,153.98x = 2,971.44 × 1,407.97
  4. Step 4: Simplify right side
    2,153.98x = 4,183,690.95
  5. Step 5: Solve for x
    x = 4,183,690.95/2,153.98
  6. Step 6: Final answer
    x = 1,942.31

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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.