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Finding the Fourth Proportional to 339,959,813.60, 509,939,720.40 and 217,515,807.20

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Solution

The fourth proportional to 339,959,813.60, 509,939,720.40 and 217,515,807.20 is: 326,273,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,959,813.60 : 509,939,720.40 = 217,515,807.20 : x
  2. Step 2: Convert to fraction form
    339,959,813.60/509,939,720.40 = 217,515,807.20/x
  3. Step 3: Cross multiply
    339,959,813.60x = 509,939,720.40 × 217,515,807.20
  4. Step 4: Simplify right side
    339,959,813.60x = 110,919,949,906,148,288
  5. Step 5: Solve for x
    x = 110,919,949,906,148,288/339,959,813.60
  6. Step 6: Final answer
    x = 326,273,710.80

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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.