Home / 678,389.36-1,017,584.04-257,664.20

Finding the Fourth Proportional to 678,389.36, 1,017,584.04 and 257,664.20

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Solution

The fourth proportional to 678,389.36, 1,017,584.04 and 257,664.20 is: 386,496.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,389.36 : 1,017,584.04 = 257,664.20 : x
  2. Step 2: Convert to fraction form
    678,389.36/1,017,584.04 = 257,664.20/x
  3. Step 3: Cross multiply
    678,389.36x = 1,017,584.04 × 257,664.20
  4. Step 4: Simplify right side
    678,389.36x = 262,194,977,599.37
  5. Step 5: Solve for x
    x = 262,194,977,599.37/678,389.36
  6. Step 6: Final answer
    x = 386,496.30

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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.