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Finding the Fourth Proportional to 2,897.94, 3,998.91 and 1,638.93

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Solution

The fourth proportional to 2,897.94, 3,998.91 and 1,638.93 is: 2,261.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,897.94 : 3,998.91 = 1,638.93 : x
  2. Step 2: Convert to fraction form
    2,897.94/3,998.91 = 1,638.93/x
  3. Step 3: Cross multiply
    2,897.94x = 3,998.91 × 1,638.93
  4. Step 4: Simplify right side
    2,897.94x = 6,553,933.57
  5. Step 5: Solve for x
    x = 6,553,933.57/2,897.94
  6. Step 6: Final answer
    x = 2,261.58

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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.