Home / 1,392.19-2,085.67-698.04

Finding the Fourth Proportional to 1,392.19, 2,085.67 and 698.04

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Solution

The fourth proportional to 1,392.19, 2,085.67 and 698.04 is: 1,045.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.19 : 2,085.67 = 698.04 : x
  2. Step 2: Convert to fraction form
    1,392.19/2,085.67 = 698.04/x
  3. Step 3: Cross multiply
    1,392.19x = 2,085.67 × 698.04
  4. Step 4: Simplify right side
    1,392.19x = 1,455,889.79
  5. Step 5: Solve for x
    x = 1,455,889.79/1,392.19
  6. Step 6: Final answer
    x = 1,045.76

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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.