Home / 619,849.80-929,774.70-438,766.20

Finding the Fourth Proportional to 619,849.80, 929,774.70 and 438,766.20

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Solution

The fourth proportional to 619,849.80, 929,774.70 and 438,766.20 is: 658,149.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,849.80 : 929,774.70 = 438,766.20 : x
  2. Step 2: Convert to fraction form
    619,849.80/929,774.70 = 438,766.20/x
  3. Step 3: Cross multiply
    619,849.80x = 929,774.70 × 438,766.20
  4. Step 4: Simplify right side
    619,849.80x = 407,953,711,975.14
  5. Step 5: Solve for x
    x = 407,953,711,975.14/619,849.80
  6. Step 6: Final answer
    x = 658,149.30

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Double scale
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Similar ratio
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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.