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Finding the Fourth Proportional to 326,575.57, 489,894.28 and 126,911.36

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Solution

The fourth proportional to 326,575.57, 489,894.28 and 126,911.36 is: 190,379.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,575.57 : 489,894.28 = 126,911.36 : x
  2. Step 2: Convert to fraction form
    326,575.57/489,894.28 = 126,911.36/x
  3. Step 3: Cross multiply
    326,575.57x = 489,894.28 × 126,911.36
  4. Step 4: Simplify right side
    326,575.57x = 62,173,147,482.82
  5. Step 5: Solve for x
    x = 62,173,147,482.82/326,575.57
  6. Step 6: Final answer
    x = 190,379.05

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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.