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Finding the Fourth Proportional to 639,017.58, 958,725.28 and 189,740.80

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Solution

The fourth proportional to 639,017.58, 958,725.28 and 189,740.80 is: 284,670.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,017.58 : 958,725.28 = 189,740.80 : x
  2. Step 2: Convert to fraction form
    639,017.58/958,725.28 = 189,740.80/x
  3. Step 3: Cross multiply
    639,017.58x = 958,725.28 × 189,740.80
  4. Step 4: Simplify right side
    639,017.58x = 181,909,301,607.42
  5. Step 5: Solve for x
    x = 181,909,301,607.42/639,017.58
  6. Step 6: Final answer
    x = 284,670.26

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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.