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Finding the Fourth Proportional to 3,855.78, 5,783.76 and 1,258.92

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Solution

The fourth proportional to 3,855.78, 5,783.76 and 1,258.92 is: 1,888.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.78 : 5,783.76 = 1,258.92 : x
  2. Step 2: Convert to fraction form
    3,855.78/5,783.76 = 1,258.92/x
  3. Step 3: Cross multiply
    3,855.78x = 5,783.76 × 1,258.92
  4. Step 4: Simplify right side
    3,855.78x = 7,281,291.14
  5. Step 5: Solve for x
    x = 7,281,291.14/3,855.78
  6. Step 6: Final answer
    x = 1,888.41

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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.