Home / 1,915.56-2,642.58-1,207.08

Finding the Fourth Proportional to 1,915.56, 2,642.58 and 1,207.08

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Solution

The fourth proportional to 1,915.56, 2,642.58 and 1,207.08 is: 1,665.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.56 : 2,642.58 = 1,207.08 : x
  2. Step 2: Convert to fraction form
    1,915.56/2,642.58 = 1,207.08/x
  3. Step 3: Cross multiply
    1,915.56x = 2,642.58 × 1,207.08
  4. Step 4: Simplify right side
    1,915.56x = 3,189,805.47
  5. Step 5: Solve for x
    x = 3,189,805.47/1,915.56
  6. Step 6: Final answer
    x = 1,665.21

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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.