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Finding the Fourth Proportional to 1,903.76, 2,857.08 and 1,392.08

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Solution

The fourth proportional to 1,903.76, 2,857.08 and 1,392.08 is: 2,089.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.76 : 2,857.08 = 1,392.08 : x
  2. Step 2: Convert to fraction form
    1,903.76/2,857.08 = 1,392.08/x
  3. Step 3: Cross multiply
    1,903.76x = 2,857.08 × 1,392.08
  4. Step 4: Simplify right side
    1,903.76x = 3,977,283.93
  5. Step 5: Solve for x
    x = 3,977,283.93/1,903.76
  6. Step 6: Final answer
    x = 2,089.17

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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.