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Finding the Fourth Proportional to 326,423.82, 489,579.30 and 86,539.26

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Solution

The fourth proportional to 326,423.82, 489,579.30 and 86,539.26 is: 129,793.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,423.82 : 489,579.30 = 86,539.26 : x
  2. Step 2: Convert to fraction form
    326,423.82/489,579.30 = 86,539.26/x
  3. Step 3: Cross multiply
    326,423.82x = 489,579.30 × 86,539.26
  4. Step 4: Simplify right side
    326,423.82x = 42,367,830,333.32
  5. Step 5: Solve for x
    x = 42,367,830,333.32/326,423.82
  6. Step 6: Final answer
    x = 129,793.93

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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.