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Finding the Fourth Proportional to 3,859.18, 5,787.58 and 1,393.68

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Solution

The fourth proportional to 3,859.18, 5,787.58 and 1,393.68 is: 2,090.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.18 : 5,787.58 = 1,393.68 : x
  2. Step 2: Convert to fraction form
    3,859.18/5,787.58 = 1,393.68/x
  3. Step 3: Cross multiply
    3,859.18x = 5,787.58 × 1,393.68
  4. Step 4: Simplify right side
    3,859.18x = 8,066,034.49
  5. Step 5: Solve for x
    x = 8,066,034.49/3,859.18
  6. Step 6: Final answer
    x = 2,090.09

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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.