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Finding the Fourth Proportional to 520,427.92, 780,067.94 and 340,438.62

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Solution

The fourth proportional to 520,427.92, 780,067.94 and 340,438.62 is: 510,282.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,427.92 : 780,067.94 = 340,438.62 : x
  2. Step 2: Convert to fraction form
    520,427.92/780,067.94 = 340,438.62/x
  3. Step 3: Cross multiply
    520,427.92x = 780,067.94 × 340,438.62
  4. Step 4: Simplify right side
    520,427.92x = 265,565,252,999.84
  5. Step 5: Solve for x
    x = 265,565,252,999.84/520,427.92
  6. Step 6: Final answer
    x = 510,282.49

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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.