Home / 3,787.51-5,681.36-1,288.69

Finding the Fourth Proportional to 3,787.51, 5,681.36 and 1,288.69

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Solution

The fourth proportional to 3,787.51, 5,681.36 and 1,288.69 is: 1,933.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,787.51 : 5,681.36 = 1,288.69 : x
  2. Step 2: Convert to fraction form
    3,787.51/5,681.36 = 1,288.69/x
  3. Step 3: Cross multiply
    3,787.51x = 5,681.36 × 1,288.69
  4. Step 4: Simplify right side
    3,787.51x = 7,321,529.17
  5. Step 5: Solve for x
    x = 7,321,529.17/3,787.51
  6. Step 6: Final answer
    x = 1,933.07

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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.