Home / 385,365,193.20-531,804,491.64-209,153,190.78

Finding the Fourth Proportional to 385,365,193.20, 531,804,491.64 and 209,153,190.78

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Solution

The fourth proportional to 385,365,193.20, 531,804,491.64 and 209,153,190.78 is: 288,631,688.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,365,193.20 : 531,804,491.64 = 209,153,190.78 : x
  2. Step 2: Convert to fraction form
    385,365,193.20/531,804,491.64 = 209,153,190.78/x
  3. Step 3: Cross multiply
    385,365,193.20x = 531,804,491.64 × 209,153,190.78
  4. Step 4: Simplify right side
    385,365,193.20x = 111,228,606,297,641,840
  5. Step 5: Solve for x
    x = 111,228,606,297,641,840/385,365,193.20
  6. Step 6: Final answer
    x = 288,631,688.23

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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.