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Finding the Fourth Proportional to 1,859.56, 2,787.21 and 1,038.22

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Solution

The fourth proportional to 1,859.56, 2,787.21 and 1,038.22 is: 1,556.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.56 : 2,787.21 = 1,038.22 : x
  2. Step 2: Convert to fraction form
    1,859.56/2,787.21 = 1,038.22/x
  3. Step 3: Cross multiply
    1,859.56x = 2,787.21 × 1,038.22
  4. Step 4: Simplify right side
    1,859.56x = 2,893,730.20
  5. Step 5: Solve for x
    x = 2,893,730.20/1,859.56
  6. Step 6: Final answer
    x = 1,556.14

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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.