Home / 387,949.54-535,365.21-218,183.66

Finding the Fourth Proportional to 387,949.54, 535,365.21 and 218,183.66

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Solution

The fourth proportional to 387,949.54, 535,365.21 and 218,183.66 is: 301,090.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,949.54 : 535,365.21 = 218,183.66 : x
  2. Step 2: Convert to fraction form
    387,949.54/535,365.21 = 218,183.66/x
  3. Step 3: Cross multiply
    387,949.54x = 535,365.21 × 218,183.66
  4. Step 4: Simplify right side
    387,949.54x = 116,807,940,954.47
  5. Step 5: Solve for x
    x = 116,807,940,954.47/387,949.54
  6. Step 6: Final answer
    x = 301,090.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.