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Finding the Fourth Proportional to 968.50, 1,336.30 and 619.30

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Solution

The fourth proportional to 968.50, 1,336.30 and 619.30 is: 854.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.50 : 1,336.30 = 619.30 : x
  2. Step 2: Convert to fraction form
    968.50/1,336.30 = 619.30/x
  3. Step 3: Cross multiply
    968.50x = 1,336.30 × 619.30
  4. Step 4: Simplify right side
    968.50x = 827,570.59
  5. Step 5: Solve for x
    x = 827,570.59/968.50
  6. Step 6: Final answer
    x = 854.49

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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.