Home / 820,623.72-1,230,922.83-421,033.92

Finding the Fourth Proportional to 820,623.72, 1,230,922.83 and 421,033.92

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Solution

The fourth proportional to 820,623.72, 1,230,922.83 and 421,033.92 is: 631,544.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,623.72 : 1,230,922.83 = 421,033.92 : x
  2. Step 2: Convert to fraction form
    820,623.72/1,230,922.83 = 421,033.92/x
  3. Step 3: Cross multiply
    820,623.72x = 1,230,922.83 × 421,033.92
  4. Step 4: Simplify right side
    820,623.72x = 518,260,264,332.39
  5. Step 5: Solve for x
    x = 518,260,264,332.39/820,623.72
  6. Step 6: Final answer
    x = 631,544.34

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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.