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Finding the Fourth Proportional to 1,869.90, 2,803.41 and 636.54

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Solution

The fourth proportional to 1,869.90, 2,803.41 and 636.54 is: 954.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.90 : 2,803.41 = 636.54 : x
  2. Step 2: Convert to fraction form
    1,869.90/2,803.41 = 636.54/x
  3. Step 3: Cross multiply
    1,869.90x = 2,803.41 × 636.54
  4. Step 4: Simplify right side
    1,869.90x = 1,784,482.60
  5. Step 5: Solve for x
    x = 1,784,482.60/1,869.90
  6. Step 6: Final answer
    x = 954.32

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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.