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Finding the Fourth Proportional to 520,092.20, 779,619.90 and 239,119.40

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Solution

The fourth proportional to 520,092.20, 779,619.90 and 239,119.40 is: 358,440.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,092.20 : 779,619.90 = 239,119.40 : x
  2. Step 2: Convert to fraction form
    520,092.20/779,619.90 = 239,119.40/x
  3. Step 3: Cross multiply
    520,092.20x = 779,619.90 × 239,119.40
  4. Step 4: Simplify right side
    520,092.20x = 186,422,242,716.06
  5. Step 5: Solve for x
    x = 186,422,242,716.06/520,092.20
  6. Step 6: Final answer
    x = 358,440.76

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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.