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Finding the Fourth Proportional to 1,938.92, 2,907.86 and 1,322.50

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Solution

The fourth proportional to 1,938.92, 2,907.86 and 1,322.50 is: 1,983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.92 : 2,907.86 = 1,322.50 : x
  2. Step 2: Convert to fraction form
    1,938.92/2,907.86 = 1,322.50/x
  3. Step 3: Cross multiply
    1,938.92x = 2,907.86 × 1,322.50
  4. Step 4: Simplify right side
    1,938.92x = 3,845,644.85
  5. Step 5: Solve for x
    x = 3,845,644.85/1,938.92
  6. Step 6: Final answer
    x = 1,983.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.