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Finding the Fourth Proportional to 228,608.64, 317,380.32 and 221,765.76

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Solution

The fourth proportional to 228,608.64, 317,380.32 and 221,765.76 is: 307,880.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,608.64 : 317,380.32 = 221,765.76 : x
  2. Step 2: Convert to fraction form
    228,608.64/317,380.32 = 221,765.76/x
  3. Step 3: Cross multiply
    228,608.64x = 317,380.32 × 221,765.76
  4. Step 4: Simplify right side
    228,608.64x = 70,384,087,873.84
  5. Step 5: Solve for x
    x = 70,384,087,873.84/228,608.64
  6. Step 6: Final answer
    x = 307,880.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.