Home / 1,680.40-2,316.56-1,282.02

Finding the Fourth Proportional to 1,680.40, 2,316.56 and 1,282.02

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Solution

The fourth proportional to 1,680.40, 2,316.56 and 1,282.02 is: 1,767.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.40 : 2,316.56 = 1,282.02 : x
  2. Step 2: Convert to fraction form
    1,680.40/2,316.56 = 1,282.02/x
  3. Step 3: Cross multiply
    1,680.40x = 2,316.56 × 1,282.02
  4. Step 4: Simplify right side
    1,680.40x = 2,969,876.25
  5. Step 5: Solve for x
    x = 2,969,876.25/1,680.40
  6. Step 6: Final answer
    x = 1,767.36

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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.