Home / 678,535.20-1,017,802.80-394,711.20

Finding the Fourth Proportional to 678,535.20, 1,017,802.80 and 394,711.20

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Solution

The fourth proportional to 678,535.20, 1,017,802.80 and 394,711.20 is: 592,066.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,535.20 : 1,017,802.80 = 394,711.20 : x
  2. Step 2: Convert to fraction form
    678,535.20/1,017,802.80 = 394,711.20/x
  3. Step 3: Cross multiply
    678,535.20x = 1,017,802.80 × 394,711.20
  4. Step 4: Simplify right side
    678,535.20x = 401,738,164,551.36
  5. Step 5: Solve for x
    x = 401,738,164,551.36/678,535.20
  6. Step 6: Final answer
    x = 592,066.80

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Double scale
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Similar ratio
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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.