Home / 1,563.15-2,157.20-900.14

Finding the Fourth Proportional to 1,563.15, 2,157.20 and 900.14

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Solution

The fourth proportional to 1,563.15, 2,157.20 and 900.14 is: 1,242.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.15 : 2,157.20 = 900.14 : x
  2. Step 2: Convert to fraction form
    1,563.15/2,157.20 = 900.14/x
  3. Step 3: Cross multiply
    1,563.15x = 2,157.20 × 900.14
  4. Step 4: Simplify right side
    1,563.15x = 1,941,766.72
  5. Step 5: Solve for x
    x = 1,941,766.72/1,563.15
  6. Step 6: Final answer
    x = 1,242.21

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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.