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Finding the Fourth Proportional to 519,392.60, 780,458.85 and 279,683.72

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Solution

The fourth proportional to 519,392.60, 780,458.85 and 279,683.72 is: 420,263.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,392.60 : 780,458.85 = 279,683.72 : x
  2. Step 2: Convert to fraction form
    519,392.60/780,458.85 = 279,683.72/x
  3. Step 3: Cross multiply
    519,392.60x = 780,458.85 × 279,683.72
  4. Step 4: Simplify right side
    519,392.60x = 218,281,634,474.92
  5. Step 5: Solve for x
    x = 218,281,634,474.92/519,392.60
  6. Step 6: Final answer
    x = 420,263.27

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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.