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Finding the Fourth Proportional to 1,563.39, 2,157.48 and 900.20

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Solution

The fourth proportional to 1,563.39, 2,157.48 and 900.20 is: 1,242.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.39 : 2,157.48 = 900.20 : x
  2. Step 2: Convert to fraction form
    1,563.39/2,157.48 = 900.20/x
  3. Step 3: Cross multiply
    1,563.39x = 2,157.48 × 900.20
  4. Step 4: Simplify right side
    1,563.39x = 1,942,152.71
  5. Step 5: Solve for x
    x = 1,942,152.71/1,563.39
  6. Step 6: Final answer
    x = 1,242.27

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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.