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Finding the Fourth Proportional to 639,188.80, 958,783.20 and 628,691.20

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Solution

The fourth proportional to 639,188.80, 958,783.20 and 628,691.20 is: 943,036.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,188.80 : 958,783.20 = 628,691.20 : x
  2. Step 2: Convert to fraction form
    639,188.80/958,783.20 = 628,691.20/x
  3. Step 3: Cross multiply
    639,188.80x = 958,783.20 × 628,691.20
  4. Step 4: Simplify right side
    639,188.80x = 602,778,560,547.84
  5. Step 5: Solve for x
    x = 602,778,560,547.84/639,188.80
  6. Step 6: Final answer
    x = 943,036.80

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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.