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Finding the Fourth Proportional to 326,416.79, 489,568.83 and 86,532.29

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Solution

The fourth proportional to 326,416.79, 489,568.83 and 86,532.29 is: 129,783.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,416.79 : 489,568.83 = 86,532.29 : x
  2. Step 2: Convert to fraction form
    326,416.79/489,568.83 = 86,532.29/x
  3. Step 3: Cross multiply
    326,416.79x = 489,568.83 × 86,532.29
  4. Step 4: Simplify right side
    326,416.79x = 42,363,511,972.52
  5. Step 5: Solve for x
    x = 42,363,511,972.52/326,416.79
  6. Step 6: Final answer
    x = 129,783.50

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1.5x scale

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.