Home / 1,721.85-2,376.21-975.79

Finding the Fourth Proportional to 1,721.85, 2,376.21 and 975.79

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Solution

The fourth proportional to 1,721.85, 2,376.21 and 975.79 is: 1,346.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.85 : 2,376.21 = 975.79 : x
  2. Step 2: Convert to fraction form
    1,721.85/2,376.21 = 975.79/x
  3. Step 3: Cross multiply
    1,721.85x = 2,376.21 × 975.79
  4. Step 4: Simplify right side
    1,721.85x = 2,318,665.20
  5. Step 5: Solve for x
    x = 2,318,665.20/1,721.85
  6. Step 6: Final answer
    x = 1,346.61

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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.