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Finding the Fourth Proportional to 1,563.49, 2,157.71 and 900.41

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Solution

The fourth proportional to 1,563.49, 2,157.71 and 900.41 is: 1,242.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.49 : 2,157.71 = 900.41 : x
  2. Step 2: Convert to fraction form
    1,563.49/2,157.71 = 900.41/x
  3. Step 3: Cross multiply
    1,563.49x = 2,157.71 × 900.41
  4. Step 4: Simplify right side
    1,563.49x = 1,942,823.66
  5. Step 5: Solve for x
    x = 1,942,823.66/1,563.49
  6. Step 6: Final answer
    x = 1,242.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.