Home / 2,208.60-3,312.27-821.70

Finding the Fourth Proportional to 2,208.60, 3,312.27 and 821.70

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Solution

The fourth proportional to 2,208.60, 3,312.27 and 821.70 is: 1,232.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.60 : 3,312.27 = 821.70 : x
  2. Step 2: Convert to fraction form
    2,208.60/3,312.27 = 821.70/x
  3. Step 3: Cross multiply
    2,208.60x = 3,312.27 × 821.70
  4. Step 4: Simplify right side
    2,208.60x = 2,721,692.26
  5. Step 5: Solve for x
    x = 2,721,692.26/2,208.60
  6. Step 6: Final answer
    x = 1,232.32

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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.