Home / 520,181,630.40-780,445,898.22-345,991,380

Finding the Fourth Proportional to 520,181,630.40, 780,445,898.22 and 345,991,380

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Solution

The fourth proportional to 520,181,630.40, 780,445,898.22 and 345,991,380 is: 519,102,439.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,181,630.40 : 780,445,898.22 = 345,991,380 : x
  2. Step 2: Convert to fraction form
    520,181,630.40/780,445,898.22 = 345,991,380/x
  3. Step 3: Cross multiply
    520,181,630.40x = 780,445,898.22 × 345,991,380
  4. Step 4: Simplify right side
    520,181,630.40x = 270,027,553,340,477,344
  5. Step 5: Solve for x
    x = 270,027,553,340,477,344/520,181,630.40
  6. Step 6: Final answer
    x = 519,102,439.53

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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.