Home / 387,455.39-581,183.08-121,218.21

Finding the Fourth Proportional to 387,455.39, 581,183.08 and 121,218.21

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Solution

The fourth proportional to 387,455.39, 581,183.08 and 121,218.21 is: 181,827.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,455.39 : 581,183.08 = 121,218.21 : x
  2. Step 2: Convert to fraction form
    387,455.39/581,183.08 = 121,218.21/x
  3. Step 3: Cross multiply
    387,455.39x = 581,183.08 × 121,218.21
  4. Step 4: Simplify right side
    387,455.39x = 70,449,972,639.89
  5. Step 5: Solve for x
    x = 70,449,972,639.89/387,455.39
  6. Step 6: Final answer
    x = 181,827.31

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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.