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Finding the Fourth Proportional to 326,615.27, 489,732.21 and 126,702.05

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Solution

The fourth proportional to 326,615.27, 489,732.21 and 126,702.05 is: 189,979.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,615.27 : 489,732.21 = 126,702.05 : x
  2. Step 2: Convert to fraction form
    326,615.27/489,732.21 = 126,702.05/x
  3. Step 3: Cross multiply
    326,615.27x = 489,732.21 × 126,702.05
  4. Step 4: Simplify right side
    326,615.27x = 62,050,072,509.37
  5. Step 5: Solve for x
    x = 62,050,072,509.37/326,615.27
  6. Step 6: Final answer
    x = 189,979.10

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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.