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Finding the Fourth Proportional to 326,613.85, 489,730.10 and 126,700.64

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Solution

The fourth proportional to 326,613.85, 489,730.10 and 126,700.64 is: 189,976.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,613.85 : 489,730.10 = 126,700.64 : x
  2. Step 2: Convert to fraction form
    326,613.85/489,730.10 = 126,700.64/x
  3. Step 3: Cross multiply
    326,613.85x = 489,730.10 × 126,700.64
  4. Step 4: Simplify right side
    326,613.85x = 62,049,116,564.29
  5. Step 5: Solve for x
    x = 62,049,116,564.29/326,613.85
  6. Step 6: Final answer
    x = 189,976.99

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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.