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Finding the Fourth Proportional to 1,561.01, 2,153.99 and 971.73

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Solution

The fourth proportional to 1,561.01, 2,153.99 and 971.73 is: 1,340.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.01 : 2,153.99 = 971.73 : x
  2. Step 2: Convert to fraction form
    1,561.01/2,153.99 = 971.73/x
  3. Step 3: Cross multiply
    1,561.01x = 2,153.99 × 971.73
  4. Step 4: Simplify right side
    1,561.01x = 2,093,099.13
  5. Step 5: Solve for x
    x = 2,093,099.13/1,561.01
  6. Step 6: Final answer
    x = 1,340.87

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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.