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Finding the Fourth Proportional to 326,702.94, 489,865.83 and 126,789.67

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Solution

The fourth proportional to 326,702.94, 489,865.83 and 126,789.67 is: 190,111.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,702.94 : 489,865.83 = 126,789.67 : x
  2. Step 2: Convert to fraction form
    326,702.94/489,865.83 = 126,789.67/x
  3. Step 3: Cross multiply
    326,702.94x = 489,865.83 × 126,789.67
  4. Step 4: Simplify right side
    326,702.94x = 62,109,927,066.85
  5. Step 5: Solve for x
    x = 62,109,927,066.85/326,702.94
  6. Step 6: Final answer
    x = 190,111.32

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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.