Home / 1,386,209.60-2,079,314.40-639,713.60

Finding the Fourth Proportional to 1,386,209.60, 2,079,314.40 and 639,713.60

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Solution

The fourth proportional to 1,386,209.60, 2,079,314.40 and 639,713.60 is: 959,570.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,209.60 : 2,079,314.40 = 639,713.60 : x
  2. Step 2: Convert to fraction form
    1,386,209.60/2,079,314.40 = 639,713.60/x
  3. Step 3: Cross multiply
    1,386,209.60x = 2,079,314.40 × 639,713.60
  4. Step 4: Simplify right side
    1,386,209.60x = 1,330,165,700,355.84
  5. Step 5: Solve for x
    x = 1,330,165,700,355.84/1,386,209.60
  6. Step 6: Final answer
    x = 959,570.40

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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.