Home / 445,768.68-664,019.97-421,623.72

Finding the Fourth Proportional to 445,768.68, 664,019.97 and 421,623.72

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Solution

The fourth proportional to 445,768.68, 664,019.97 and 421,623.72 is: 628,053.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,768.68 : 664,019.97 = 421,623.72 : x
  2. Step 2: Convert to fraction form
    445,768.68/664,019.97 = 421,623.72/x
  3. Step 3: Cross multiply
    445,768.68x = 664,019.97 × 421,623.72
  4. Step 4: Simplify right side
    445,768.68x = 279,966,569,905.69
  5. Step 5: Solve for x
    x = 279,966,569,905.69/445,768.68
  6. Step 6: Final answer
    x = 628,053.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.