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Finding the Fourth Proportional to 2,152.60, 3,228.08 and 920.58

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Solution

The fourth proportional to 2,152.60, 3,228.08 and 920.58 is: 1,380.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,152.60 : 3,228.08 = 920.58 : x
  2. Step 2: Convert to fraction form
    2,152.60/3,228.08 = 920.58/x
  3. Step 3: Cross multiply
    2,152.60x = 3,228.08 × 920.58
  4. Step 4: Simplify right side
    2,152.60x = 2,971,705.89
  5. Step 5: Solve for x
    x = 2,971,705.89/2,152.60
  6. Step 6: Final answer
    x = 1,380.52

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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.