Home / 1,563.15-2,157.24-900.12

Finding the Fourth Proportional to 1,563.15, 2,157.24 and 900.12

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Solution

The fourth proportional to 1,563.15, 2,157.24 and 900.12 is: 1,242.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.15 : 2,157.24 = 900.12 : x
  2. Step 2: Convert to fraction form
    1,563.15/2,157.24 = 900.12/x
  3. Step 3: Cross multiply
    1,563.15x = 2,157.24 × 900.12
  4. Step 4: Simplify right side
    1,563.15x = 1,941,764.08
  5. Step 5: Solve for x
    x = 1,941,764.08/1,563.15
  6. Step 6: Final answer
    x = 1,242.22

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1.5x scale

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.