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Finding the Fourth Proportional to 665.60, 992.77 and 620.24

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Solution

The fourth proportional to 665.60, 992.77 and 620.24 is: 925.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.60 : 992.77 = 620.24 : x
  2. Step 2: Convert to fraction form
    665.60/992.77 = 620.24/x
  3. Step 3: Cross multiply
    665.60x = 992.77 × 620.24
  4. Step 4: Simplify right side
    665.60x = 615,755.66
  5. Step 5: Solve for x
    x = 615,755.66/665.60
  6. Step 6: Final answer
    x = 925.11

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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.