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Finding the Fourth Proportional to 2,858.19, 4,283.74 and 1,687

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Solution

The fourth proportional to 2,858.19, 4,283.74 and 1,687 is: 2,528.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.19 : 4,283.74 = 1,687 : x
  2. Step 2: Convert to fraction form
    2,858.19/4,283.74 = 1,687/x
  3. Step 3: Cross multiply
    2,858.19x = 4,283.74 × 1,687
  4. Step 4: Simplify right side
    2,858.19x = 7,226,669.38
  5. Step 5: Solve for x
    x = 7,226,669.38/2,858.19
  6. Step 6: Final answer
    x = 2,528.41

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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.