Home / 743,161.79-1,025,528.93-420,874.20

Finding the Fourth Proportional to 743,161.79, 1,025,528.93 and 420,874.20

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Solution

The fourth proportional to 743,161.79, 1,025,528.93 and 420,874.20 is: 580,786.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,161.79 : 1,025,528.93 = 420,874.20 : x
  2. Step 2: Convert to fraction form
    743,161.79/1,025,528.93 = 420,874.20/x
  3. Step 3: Cross multiply
    743,161.79x = 1,025,528.93 × 420,874.20
  4. Step 4: Simplify right side
    743,161.79x = 431,618,667,990.61
  5. Step 5: Solve for x
    x = 431,618,667,990.61/743,161.79
  6. Step 6: Final answer
    x = 580,786.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.