Home / 2,172.12-3,258.15-528.67

Finding the Fourth Proportional to 2,172.12, 3,258.15 and 528.67

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Solution

The fourth proportional to 2,172.12, 3,258.15 and 528.67 is: 792.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.12 : 3,258.15 = 528.67 : x
  2. Step 2: Convert to fraction form
    2,172.12/3,258.15 = 528.67/x
  3. Step 3: Cross multiply
    2,172.12x = 3,258.15 × 528.67
  4. Step 4: Simplify right side
    2,172.12x = 1,722,479.34
  5. Step 5: Solve for x
    x = 1,722,479.34/2,172.12
  6. Step 6: Final answer
    x = 792.99

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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.