Home / 1,712.20-2,362.10-1,318.60

Finding the Fourth Proportional to 1,712.20, 2,362.10 and 1,318.60

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Solution

The fourth proportional to 1,712.20, 2,362.10 and 1,318.60 is: 1,819.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,712.20 : 2,362.10 = 1,318.60 : x
  2. Step 2: Convert to fraction form
    1,712.20/2,362.10 = 1,318.60/x
  3. Step 3: Cross multiply
    1,712.20x = 2,362.10 × 1,318.60
  4. Step 4: Simplify right side
    1,712.20x = 3,114,665.06
  5. Step 5: Solve for x
    x = 3,114,665.06/1,712.20
  6. Step 6: Final answer
    x = 1,819.10

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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.