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Finding the Fourth Proportional to 3,860.19, 5,787.41 and 1,807.71

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Solution

The fourth proportional to 3,860.19, 5,787.41 and 1,807.71 is: 2,710.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860.19 : 5,787.41 = 1,807.71 : x
  2. Step 2: Convert to fraction form
    3,860.19/5,787.41 = 1,807.71/x
  3. Step 3: Cross multiply
    3,860.19x = 5,787.41 × 1,807.71
  4. Step 4: Simplify right side
    3,860.19x = 10,461,949.89
  5. Step 5: Solve for x
    x = 10,461,949.89/3,860.19
  6. Step 6: Final answer
    x = 2,710.22

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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.