Home / 678,300.60-1,017,450.90-639,593.40

Finding the Fourth Proportional to 678,300.60, 1,017,450.90 and 639,593.40

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Solution

The fourth proportional to 678,300.60, 1,017,450.90 and 639,593.40 is: 959,390.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,300.60 : 1,017,450.90 = 639,593.40 : x
  2. Step 2: Convert to fraction form
    678,300.60/1,017,450.90 = 639,593.40/x
  3. Step 3: Cross multiply
    678,300.60x = 1,017,450.90 × 639,593.40
  4. Step 4: Simplify right side
    678,300.60x = 650,754,880,464.06
  5. Step 5: Solve for x
    x = 650,754,880,464.06/678,300.60
  6. Step 6: Final answer
    x = 959,390.10

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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.