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Finding the Fourth Proportional to 391,897.42, 540,860.73 and 222,113.32

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Solution

The fourth proportional to 391,897.42, 540,860.73 and 222,113.32 is: 306,540.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,897.42 : 540,860.73 = 222,113.32 : x
  2. Step 2: Convert to fraction form
    391,897.42/540,860.73 = 222,113.32/x
  3. Step 3: Cross multiply
    391,897.42x = 540,860.73 × 222,113.32
  4. Step 4: Simplify right side
    391,897.42x = 120,132,368,583.05
  5. Step 5: Solve for x
    x = 120,132,368,583.05/391,897.42
  6. Step 6: Final answer
    x = 306,540.34

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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.