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Finding the Fourth Proportional to 660.65, 995.51 and 547.64

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Solution

The fourth proportional to 660.65, 995.51 and 547.64 is: 825.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.65 : 995.51 = 547.64 : x
  2. Step 2: Convert to fraction form
    660.65/995.51 = 547.64/x
  3. Step 3: Cross multiply
    660.65x = 995.51 × 547.64
  4. Step 4: Simplify right side
    660.65x = 545,173.38
  5. Step 5: Solve for x
    x = 545,173.38/660.65
  6. Step 6: Final answer
    x = 825.21

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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.