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Finding the Fourth Proportional to 519,383.91, 780,445.81 and 279,675.04

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Solution

The fourth proportional to 519,383.91, 780,445.81 and 279,675.04 is: 420,250.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,383.91 : 780,445.81 = 279,675.04 : x
  2. Step 2: Convert to fraction form
    519,383.91/780,445.81 = 279,675.04/x
  3. Step 3: Cross multiply
    519,383.91x = 780,445.81 × 279,675.04
  4. Step 4: Simplify right side
    519,383.91x = 218,271,215,072.13
  5. Step 5: Solve for x
    x = 218,271,215,072.13/519,383.91
  6. Step 6: Final answer
    x = 420,250.24

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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.