Home / 1,427.20-2,141.45-907.07

Finding the Fourth Proportional to 1,427.20, 2,141.45 and 907.07

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Solution

The fourth proportional to 1,427.20, 2,141.45 and 907.07 is: 1,361.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.20 : 2,141.45 = 907.07 : x
  2. Step 2: Convert to fraction form
    1,427.20/2,141.45 = 907.07/x
  3. Step 3: Cross multiply
    1,427.20x = 2,141.45 × 907.07
  4. Step 4: Simplify right side
    1,427.20x = 1,942,441.65
  5. Step 5: Solve for x
    x = 1,942,441.65/1,427.20
  6. Step 6: Final answer
    x = 1,361.01

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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.