Home / 1,655.36-2,478.39-1,215.21

Finding the Fourth Proportional to 1,655.36, 2,478.39 and 1,215.21

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Solution

The fourth proportional to 1,655.36, 2,478.39 and 1,215.21 is: 1,819.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,655.36 : 2,478.39 = 1,215.21 : x
  2. Step 2: Convert to fraction form
    1,655.36/2,478.39 = 1,215.21/x
  3. Step 3: Cross multiply
    1,655.36x = 2,478.39 × 1,215.21
  4. Step 4: Simplify right side
    1,655.36x = 3,011,764.31
  5. Step 5: Solve for x
    x = 3,011,764.31/1,655.36
  6. Step 6: Final answer
    x = 1,819.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.