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Finding the Fourth Proportional to 619,784.60, 929,458.20 and 220,438.40

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Solution

The fourth proportional to 619,784.60, 929,458.20 and 220,438.40 is: 330,579.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,784.60 : 929,458.20 = 220,438.40 : x
  2. Step 2: Convert to fraction form
    619,784.60/929,458.20 = 220,438.40/x
  3. Step 3: Cross multiply
    619,784.60x = 929,458.20 × 220,438.40
  4. Step 4: Simplify right side
    619,784.60x = 204,888,278,474.88
  5. Step 5: Solve for x
    x = 204,888,278,474.88/619,784.60
  6. Step 6: Final answer
    x = 330,579.82

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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.