Home / 1,440.20-2,160.36-789.63

Finding the Fourth Proportional to 1,440.20, 2,160.36 and 789.63

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Solution

The fourth proportional to 1,440.20, 2,160.36 and 789.63 is: 1,184.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.20 : 2,160.36 = 789.63 : x
  2. Step 2: Convert to fraction form
    1,440.20/2,160.36 = 789.63/x
  3. Step 3: Cross multiply
    1,440.20x = 2,160.36 × 789.63
  4. Step 4: Simplify right side
    1,440.20x = 1,705,885.07
  5. Step 5: Solve for x
    x = 1,705,885.07/1,440.20
  6. Step 6: Final answer
    x = 1,184.48

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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.