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Finding the Fourth Proportional to 664.60, 995.46 and 578.20

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Solution

The fourth proportional to 664.60, 995.46 and 578.20 is: 866.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.60 : 995.46 = 578.20 : x
  2. Step 2: Convert to fraction form
    664.60/995.46 = 578.20/x
  3. Step 3: Cross multiply
    664.60x = 995.46 × 578.20
  4. Step 4: Simplify right side
    664.60x = 575,574.97
  5. Step 5: Solve for x
    x = 575,574.97/664.60
  6. Step 6: Final answer
    x = 866.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.