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Finding the Fourth Proportional to 326,615.77, 489,732.96 and 126,702.55

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Solution

The fourth proportional to 326,615.77, 489,732.96 and 126,702.55 is: 189,979.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,615.77 : 489,732.96 = 126,702.55 : x
  2. Step 2: Convert to fraction form
    326,615.77/489,732.96 = 126,702.55/x
  3. Step 3: Cross multiply
    326,615.77x = 489,732.96 × 126,702.55
  4. Step 4: Simplify right side
    326,615.77x = 62,050,412,402.38
  5. Step 5: Solve for x
    x = 62,050,412,402.38/326,615.77
  6. Step 6: Final answer
    x = 189,979.84

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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.