Home / 821,660.20-1,233,411.90-489,423.40

Finding the Fourth Proportional to 821,660.20, 1,233,411.90 and 489,423.40

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Solution

The fourth proportional to 821,660.20, 1,233,411.90 and 489,423.40 is: 734,684.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,660.20 : 1,233,411.90 = 489,423.40 : x
  2. Step 2: Convert to fraction form
    821,660.20/1,233,411.90 = 489,423.40/x
  3. Step 3: Cross multiply
    821,660.20x = 1,233,411.90 × 489,423.40
  4. Step 4: Simplify right side
    821,660.20x = 603,660,645,698.46
  5. Step 5: Solve for x
    x = 603,660,645,698.46/821,660.20
  6. Step 6: Final answer
    x = 734,684.05

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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.