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Finding the Fourth Proportional to 968.48, 1,335.80 and 619.36

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Solution

The fourth proportional to 968.48, 1,335.80 and 619.36 is: 854.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.48 : 1,335.80 = 619.36 : x
  2. Step 2: Convert to fraction form
    968.48/1,335.80 = 619.36/x
  3. Step 3: Cross multiply
    968.48x = 1,335.80 × 619.36
  4. Step 4: Simplify right side
    968.48x = 827,341.09
  5. Step 5: Solve for x
    x = 827,341.09/968.48
  6. Step 6: Final answer
    x = 854.27

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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.