Home / 1,209.20-1,806.10-1,073.12

Finding the Fourth Proportional to 1,209.20, 1,806.10 and 1,073.12

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Solution

The fourth proportional to 1,209.20, 1,806.10 and 1,073.12 is: 1,602.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.20 : 1,806.10 = 1,073.12 : x
  2. Step 2: Convert to fraction form
    1,209.20/1,806.10 = 1,073.12/x
  3. Step 3: Cross multiply
    1,209.20x = 1,806.10 × 1,073.12
  4. Step 4: Simplify right side
    1,209.20x = 1,938,150.32
  5. Step 5: Solve for x
    x = 1,938,150.32/1,209.20
  6. Step 6: Final answer
    x = 1,602.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.