Home / 645,904.82-890,843.73-419,623.22

Finding the Fourth Proportional to 645,904.82, 890,843.73 and 419,623.22

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Solution

The fourth proportional to 645,904.82, 890,843.73 and 419,623.22 is: 578,752.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,904.82 : 890,843.73 = 419,623.22 : x
  2. Step 2: Convert to fraction form
    645,904.82/890,843.73 = 419,623.22/x
  3. Step 3: Cross multiply
    645,904.82x = 890,843.73 × 419,623.22
  4. Step 4: Simplify right side
    645,904.82x = 373,818,714,499.41
  5. Step 5: Solve for x
    x = 373,818,714,499.41/645,904.82
  6. Step 6: Final answer
    x = 578,752.01

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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.