Home / 520,181,630.90-780,445,898.98-345,991,380.50

Finding the Fourth Proportional to 520,181,630.90, 780,445,898.98 and 345,991,380.50

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Solution

The fourth proportional to 520,181,630.90, 780,445,898.98 and 345,991,380.50 is: 519,102,440.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,181,630.90 : 780,445,898.98 = 345,991,380.50 : x
  2. Step 2: Convert to fraction form
    520,181,630.90/780,445,898.98 = 345,991,380.50/x
  3. Step 3: Cross multiply
    520,181,630.90x = 780,445,898.98 × 345,991,380.50
  4. Step 4: Simplify right side
    520,181,630.90x = 270,027,553,993,653,760
  5. Step 5: Solve for x
    x = 270,027,553,993,653,760/520,181,630.90
  6. Step 6: Final answer
    x = 519,102,440.29

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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.