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Finding the Fourth Proportional to 1,878.94, 2,594.21 and 1,171.07

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Solution

The fourth proportional to 1,878.94, 2,594.21 and 1,171.07 is: 1,616.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,878.94 : 2,594.21 = 1,171.07 : x
  2. Step 2: Convert to fraction form
    1,878.94/2,594.21 = 1,171.07/x
  3. Step 3: Cross multiply
    1,878.94x = 2,594.21 × 1,171.07
  4. Step 4: Simplify right side
    1,878.94x = 3,038,001.50
  5. Step 5: Solve for x
    x = 3,038,001.50/1,878.94
  6. Step 6: Final answer
    x = 1,616.87

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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.