Home / 1,427.32-2,129.45-1,219.48

Finding the Fourth Proportional to 1,427.32, 2,129.45 and 1,219.48

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Solution

The fourth proportional to 1,427.32, 2,129.45 and 1,219.48 is: 1,819.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.32 : 2,129.45 = 1,219.48 : x
  2. Step 2: Convert to fraction form
    1,427.32/2,129.45 = 1,219.48/x
  3. Step 3: Cross multiply
    1,427.32x = 2,129.45 × 1,219.48
  4. Step 4: Simplify right side
    1,427.32x = 2,596,821.69
  5. Step 5: Solve for x
    x = 2,596,821.69/1,427.32
  6. Step 6: Final answer
    x = 1,819.37

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1.5x scale

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.