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Finding the Fourth Proportional to 2,887.73, 4,328.00 and 1,405.74

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Solution

The fourth proportional to 2,887.73, 4,328.00 and 1,405.74 is: 2,106.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.73 : 4,328.00 = 1,405.74 : x
  2. Step 2: Convert to fraction form
    2,887.73/4,328.00 = 1,405.74/x
  3. Step 3: Cross multiply
    2,887.73x = 4,328.00 × 1,405.74
  4. Step 4: Simplify right side
    2,887.73x = 6,084,046.23
  5. Step 5: Solve for x
    x = 6,084,046.23/2,887.73
  6. Step 6: Final answer
    x = 2,106.86

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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.