Home / 391,933.16-540,982.87-255,987.89

Finding the Fourth Proportional to 391,933.16, 540,982.87 and 255,987.89

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Solution

The fourth proportional to 391,933.16, 540,982.87 and 255,987.89 is: 353,338.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,933.16 : 540,982.87 = 255,987.89 : x
  2. Step 2: Convert to fraction form
    391,933.16/540,982.87 = 255,987.89/x
  3. Step 3: Cross multiply
    391,933.16x = 540,982.87 × 255,987.89
  4. Step 4: Simplify right side
    391,933.16x = 138,485,062,137.51
  5. Step 5: Solve for x
    x = 138,485,062,137.51/391,933.16
  6. Step 6: Final answer
    x = 353,338.47

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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.