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Finding the Fourth Proportional to 637,959,784.40, 956,939,676.60 and 347,722,139.60

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Solution

The fourth proportional to 637,959,784.40, 956,939,676.60 and 347,722,139.60 is: 521,583,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,959,784.40 : 956,939,676.60 = 347,722,139.60 : x
  2. Step 2: Convert to fraction form
    637,959,784.40/956,939,676.60 = 347,722,139.60/x
  3. Step 3: Cross multiply
    637,959,784.40x = 956,939,676.60 × 347,722,139.60
  4. Step 4: Simplify right side
    637,959,784.40x = 332,749,111,815,484,096
  5. Step 5: Solve for x
    x = 332,749,111,815,484,096/637,959,784.40
  6. Step 6: Final answer
    x = 521,583,209.40

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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.