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Finding the Fourth Proportional to 326,320.83, 489,422.85 and 207,639.63

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Solution

The fourth proportional to 326,320.83, 489,422.85 and 207,639.63 is: 311,422.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,320.83 : 489,422.85 = 207,639.63 : x
  2. Step 2: Convert to fraction form
    326,320.83/489,422.85 = 207,639.63/x
  3. Step 3: Cross multiply
    326,320.83x = 489,422.85 × 207,639.63
  4. Step 4: Simplify right side
    326,320.83x = 101,623,579,487.55
  5. Step 5: Solve for x
    x = 101,623,579,487.55/326,320.83
  6. Step 6: Final answer
    x = 311,422.29

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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.