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Finding the Fourth Proportional to 391,860.36, 540,773.19 and 219,816.45

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Solution

The fourth proportional to 391,860.36, 540,773.19 and 219,816.45 is: 303,350.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,860.36 : 540,773.19 = 219,816.45 : x
  2. Step 2: Convert to fraction form
    391,860.36/540,773.19 = 219,816.45/x
  3. Step 3: Cross multiply
    391,860.36x = 540,773.19 × 219,816.45
  4. Step 4: Simplify right side
    391,860.36x = 118,870,842,880.98
  5. Step 5: Solve for x
    x = 118,870,842,880.98/391,860.36
  6. Step 6: Final answer
    x = 303,350.01

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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.