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Finding the Fourth Proportional to 4,915.68, 6,783.20 and 2,819.68

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Solution

The fourth proportional to 4,915.68, 6,783.20 and 2,819.68 is: 3,890.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,915.68 : 6,783.20 = 2,819.68 : x
  2. Step 2: Convert to fraction form
    4,915.68/6,783.20 = 2,819.68/x
  3. Step 3: Cross multiply
    4,915.68x = 6,783.20 × 2,819.68
  4. Step 4: Simplify right side
    4,915.68x = 19,126,453.38
  5. Step 5: Solve for x
    x = 19,126,453.38/4,915.68
  6. Step 6: Final answer
    x = 3,890.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.