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Finding the Fourth Proportional to 429,798,972.80, 643,326,772.80 and 339,099,708.80

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Solution

The fourth proportional to 429,798,972.80, 643,326,772.80 and 339,099,708.80 is: 507,567,339.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,798,972.80 : 643,326,772.80 = 339,099,708.80 : x
  2. Step 2: Convert to fraction form
    429,798,972.80/643,326,772.80 = 339,099,708.80/x
  3. Step 3: Cross multiply
    429,798,972.80x = 643,326,772.80 × 339,099,708.80
  4. Step 4: Simplify right side
    429,798,972.80x = 218,151,921,319,723,744
  5. Step 5: Solve for x
    x = 218,151,921,319,723,744/429,798,972.80
  6. Step 6: Final answer
    x = 507,567,339.91

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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.