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Finding the Fourth Proportional to 681.60, 941.56 and 607.88

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Solution

The fourth proportional to 681.60, 941.56 and 607.88 is: 839.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.60 : 941.56 = 607.88 : x
  2. Step 2: Convert to fraction form
    681.60/941.56 = 607.88/x
  3. Step 3: Cross multiply
    681.60x = 941.56 × 607.88
  4. Step 4: Simplify right side
    681.60x = 572,355.49
  5. Step 5: Solve for x
    x = 572,355.49/681.60
  6. Step 6: Final answer
    x = 839.72

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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.