Home / 378,501,138.40-522,309,775.44-211,224,280.72

Finding the Fourth Proportional to 378,501,138.40, 522,309,775.44 and 211,224,280.72

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Solution

The fourth proportional to 378,501,138.40, 522,309,775.44 and 211,224,280.72 is: 291,477,344.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,501,138.40 : 522,309,775.44 = 211,224,280.72 : x
  2. Step 2: Convert to fraction form
    378,501,138.40/522,309,775.44 = 211,224,280.72/x
  3. Step 3: Cross multiply
    378,501,138.40x = 522,309,775.44 × 211,224,280.72
  4. Step 4: Simplify right side
    378,501,138.40x = 110,324,506,630,338,720
  5. Step 5: Solve for x
    x = 110,324,506,630,338,720/378,501,138.40
  6. Step 6: Final answer
    x = 291,477,344.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.