Home / 1,239.88-1,714.32-1,084.24

Finding the Fourth Proportional to 1,239.88, 1,714.32 and 1,084.24

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Solution

The fourth proportional to 1,239.88, 1,714.32 and 1,084.24 is: 1,499.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.88 : 1,714.32 = 1,084.24 : x
  2. Step 2: Convert to fraction form
    1,239.88/1,714.32 = 1,084.24/x
  3. Step 3: Cross multiply
    1,239.88x = 1,714.32 × 1,084.24
  4. Step 4: Simplify right side
    1,239.88x = 1,858,734.32
  5. Step 5: Solve for x
    x = 1,858,734.32/1,239.88
  6. Step 6: Final answer
    x = 1,499.12

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1.5x scale

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.