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Finding the Fourth Proportional to 609,228, 840,618 and 394,338.24

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Solution

The fourth proportional to 609,228, 840,618 and 394,338.24 is: 544,111.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,228 : 840,618 = 394,338.24 : x
  2. Step 2: Convert to fraction form
    609,228/840,618 = 394,338.24/x
  3. Step 3: Cross multiply
    609,228x = 840,618 × 394,338.24
  4. Step 4: Simplify right side
    609,228x = 331,487,822,632.32
  5. Step 5: Solve for x
    x = 331,487,822,632.32/609,228
  6. Step 6: Final answer
    x = 544,111.27

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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.