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Finding the Fourth Proportional to 3,187, 4,780.50 and 1,363

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Solution

The fourth proportional to 3,187, 4,780.50 and 1,363 is: 2,044.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187 : 4,780.50 = 1,363 : x
  2. Step 2: Convert to fraction form
    3,187/4,780.50 = 1,363/x
  3. Step 3: Cross multiply
    3,187x = 4,780.50 × 1,363
  4. Step 4: Simplify right side
    3,187x = 6,515,821.50
  5. Step 5: Solve for x
    x = 6,515,821.50/3,187
  6. Step 6: Final answer
    x = 2,044.50

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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.