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Finding the Fourth Proportional to 2,153.95, 2,975.38 and 1,687.74

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Solution

The fourth proportional to 2,153.95, 2,975.38 and 1,687.74 is: 2,331.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.95 : 2,975.38 = 1,687.74 : x
  2. Step 2: Convert to fraction form
    2,153.95/2,975.38 = 1,687.74/x
  3. Step 3: Cross multiply
    2,153.95x = 2,975.38 × 1,687.74
  4. Step 4: Simplify right side
    2,153.95x = 5,021,667.84
  5. Step 5: Solve for x
    x = 5,021,667.84/2,153.95
  6. Step 6: Final answer
    x = 2,331.38

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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.