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Finding the Fourth Proportional to 666.65, 995.06 and 588.80

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Solution

The fourth proportional to 666.65, 995.06 and 588.80 is: 878.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.65 : 995.06 = 588.80 : x
  2. Step 2: Convert to fraction form
    666.65/995.06 = 588.80/x
  3. Step 3: Cross multiply
    666.65x = 995.06 × 588.80
  4. Step 4: Simplify right side
    666.65x = 585,883.41
  5. Step 5: Solve for x
    x = 585,883.41/666.65
  6. Step 6: Final answer
    x = 878.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.