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Finding the Fourth Proportional to 520,129.44, 780,138.27 and 352,724.31

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Solution

The fourth proportional to 520,129.44, 780,138.27 and 352,724.31 is: 529,048.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,129.44 : 780,138.27 = 352,724.31 : x
  2. Step 2: Convert to fraction form
    520,129.44/780,138.27 = 352,724.31/x
  3. Step 3: Cross multiply
    520,129.44x = 780,138.27 × 352,724.31
  4. Step 4: Simplify right side
    520,129.44x = 275,173,732,990.34
  5. Step 5: Solve for x
    x = 275,173,732,990.34/520,129.44
  6. Step 6: Final answer
    x = 529,048.56

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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.