Home / 1,317.89-1,976.84-452.21

Finding the Fourth Proportional to 1,317.89, 1,976.84 and 452.21

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Solution

The fourth proportional to 1,317.89, 1,976.84 and 452.21 is: 678.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.89 : 1,976.84 = 452.21 : x
  2. Step 2: Convert to fraction form
    1,317.89/1,976.84 = 452.21/x
  3. Step 3: Cross multiply
    1,317.89x = 1,976.84 × 452.21
  4. Step 4: Simplify right side
    1,317.89x = 893,944.56
  5. Step 5: Solve for x
    x = 893,944.56/1,317.89
  6. Step 6: Final answer
    x = 678.32

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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.