Home / 1,387.09-1,915.26-968.50

Finding the Fourth Proportional to 1,387.09, 1,915.26 and 968.50

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Solution

The fourth proportional to 1,387.09, 1,915.26 and 968.50 is: 1,337.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.09 : 1,915.26 = 968.50 : x
  2. Step 2: Convert to fraction form
    1,387.09/1,915.26 = 968.50/x
  3. Step 3: Cross multiply
    1,387.09x = 1,915.26 × 968.50
  4. Step 4: Simplify right side
    1,387.09x = 1,854,919.73
  5. Step 5: Solve for x
    x = 1,854,919.73/1,387.09
  6. Step 6: Final answer
    x = 1,337.28

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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.