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Finding the Fourth Proportional to 1,600.78, 2,209.08 and 902.20

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Solution

The fourth proportional to 1,600.78, 2,209.08 and 902.20 is: 1,245.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,600.78 : 2,209.08 = 902.20 : x
  2. Step 2: Convert to fraction form
    1,600.78/2,209.08 = 902.20/x
  3. Step 3: Cross multiply
    1,600.78x = 2,209.08 × 902.20
  4. Step 4: Simplify right side
    1,600.78x = 1,993,031.98
  5. Step 5: Solve for x
    x = 1,993,031.98/1,600.78
  6. Step 6: Final answer
    x = 1,245.04

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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.