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Finding the Fourth Proportional to 298,972,638.60, 448,458,957.90 and 137,729,502.60

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Solution

The fourth proportional to 298,972,638.60, 448,458,957.90 and 137,729,502.60 is: 206,594,253.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,972,638.60 : 448,458,957.90 = 137,729,502.60 : x
  2. Step 2: Convert to fraction form
    298,972,638.60/448,458,957.90 = 137,729,502.60/x
  3. Step 3: Cross multiply
    298,972,638.60x = 448,458,957.90 × 137,729,502.60
  4. Step 4: Simplify right side
    298,972,638.60x = 61,766,029,208,081,336
  5. Step 5: Solve for x
    x = 61,766,029,208,081,336/298,972,638.60
  6. Step 6: Final answer
    x = 206,594,253.90

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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.