Home / 1,720.22-2,373.21-1,216.80

Finding the Fourth Proportional to 1,720.22, 2,373.21 and 1,216.80

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Solution

The fourth proportional to 1,720.22, 2,373.21 and 1,216.80 is: 1,678.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.22 : 2,373.21 = 1,216.80 : x
  2. Step 2: Convert to fraction form
    1,720.22/2,373.21 = 1,216.80/x
  3. Step 3: Cross multiply
    1,720.22x = 2,373.21 × 1,216.80
  4. Step 4: Simplify right side
    1,720.22x = 2,887,721.93
  5. Step 5: Solve for x
    x = 2,887,721.93/1,720.22
  6. Step 6: Final answer
    x = 1,678.70

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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.