Home / 445,438.20-668,157.30-129,905.40

Finding the Fourth Proportional to 445,438.20, 668,157.30 and 129,905.40

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Solution

The fourth proportional to 445,438.20, 668,157.30 and 129,905.40 is: 194,858.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,438.20 : 668,157.30 = 129,905.40 : x
  2. Step 2: Convert to fraction form
    445,438.20/668,157.30 = 129,905.40/x
  3. Step 3: Cross multiply
    445,438.20x = 668,157.30 × 129,905.40
  4. Step 4: Simplify right side
    445,438.20x = 86,797,241,319.42
  5. Step 5: Solve for x
    x = 86,797,241,319.42/445,438.20
  6. Step 6: Final answer
    x = 194,858.10

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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.