Home / 1,643.76-2,270.33-1,308.80

Finding the Fourth Proportional to 1,643.76, 2,270.33 and 1,308.80

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Solution

The fourth proportional to 1,643.76, 2,270.33 and 1,308.80 is: 1,807.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.76 : 2,270.33 = 1,308.80 : x
  2. Step 2: Convert to fraction form
    1,643.76/2,270.33 = 1,308.80/x
  3. Step 3: Cross multiply
    1,643.76x = 2,270.33 × 1,308.80
  4. Step 4: Simplify right side
    1,643.76x = 2,971,407.90
  5. Step 5: Solve for x
    x = 2,971,407.90/1,643.76
  6. Step 6: Final answer
    x = 1,807.69

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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.