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Finding the Fourth Proportional to 519,392.84, 780,459.20 and 279,683.96

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Solution

The fourth proportional to 519,392.84, 780,459.20 and 279,683.96 is: 420,263.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,392.84 : 780,459.20 = 279,683.96 : x
  2. Step 2: Convert to fraction form
    519,392.84/780,459.20 = 279,683.96/x
  3. Step 3: Cross multiply
    519,392.84x = 780,459.20 × 279,683.96
  4. Step 4: Simplify right side
    519,392.84x = 218,281,919,674.43
  5. Step 5: Solve for x
    x = 218,281,919,674.43/519,392.84
  6. Step 6: Final answer
    x = 420,263.63

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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.