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Finding the Fourth Proportional to 660.76, 995.08 and 499.60

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Solution

The fourth proportional to 660.76, 995.08 and 499.60 is: 752.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.76 : 995.08 = 499.60 : x
  2. Step 2: Convert to fraction form
    660.76/995.08 = 499.60/x
  3. Step 3: Cross multiply
    660.76x = 995.08 × 499.60
  4. Step 4: Simplify right side
    660.76x = 497,141.97
  5. Step 5: Solve for x
    x = 497,141.97/660.76
  6. Step 6: Final answer
    x = 752.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.