Home / 1,571.20-2,168.49-981.93

Finding the Fourth Proportional to 1,571.20, 2,168.49 and 981.93

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Solution

The fourth proportional to 1,571.20, 2,168.49 and 981.93 is: 1,355.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.20 : 2,168.49 = 981.93 : x
  2. Step 2: Convert to fraction form
    1,571.20/2,168.49 = 981.93/x
  3. Step 3: Cross multiply
    1,571.20x = 2,168.49 × 981.93
  4. Step 4: Simplify right side
    1,571.20x = 2,129,305.39
  5. Step 5: Solve for x
    x = 2,129,305.39/1,571.20
  6. Step 6: Final answer
    x = 1,355.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.