Home / 678,277.60-1,017,416.40-639,570.40

Finding the Fourth Proportional to 678,277.60, 1,017,416.40 and 639,570.40

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Solution

The fourth proportional to 678,277.60, 1,017,416.40 and 639,570.40 is: 959,355.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,277.60 : 1,017,416.40 = 639,570.40 : x
  2. Step 2: Convert to fraction form
    678,277.60/1,017,416.40 = 639,570.40/x
  3. Step 3: Cross multiply
    678,277.60x = 1,017,416.40 × 639,570.40
  4. Step 4: Simplify right side
    678,277.60x = 650,709,413,914.56
  5. Step 5: Solve for x
    x = 650,709,413,914.56/678,277.60
  6. Step 6: Final answer
    x = 959,355.60

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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.