Home / 1,563.12-2,157.12-900.18

Finding the Fourth Proportional to 1,563.12, 2,157.12 and 900.18

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Solution

The fourth proportional to 1,563.12, 2,157.12 and 900.18 is: 1,242.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.12 : 2,157.12 = 900.18 : x
  2. Step 2: Convert to fraction form
    1,563.12/2,157.12 = 900.18/x
  3. Step 3: Cross multiply
    1,563.12x = 2,157.12 × 900.18
  4. Step 4: Simplify right side
    1,563.12x = 1,941,796.28
  5. Step 5: Solve for x
    x = 1,941,796.28/1,563.12
  6. Step 6: Final answer
    x = 1,242.26

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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.