Home / 412,985.20-619,477.80-384,991.60

Finding the Fourth Proportional to 412,985.20, 619,477.80 and 384,991.60

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Solution

The fourth proportional to 412,985.20, 619,477.80 and 384,991.60 is: 577,487.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,985.20 : 619,477.80 = 384,991.60 : x
  2. Step 2: Convert to fraction form
    412,985.20/619,477.80 = 384,991.60/x
  3. Step 3: Cross multiply
    412,985.20x = 619,477.80 × 384,991.60
  4. Step 4: Simplify right side
    412,985.20x = 238,493,749,386.48
  5. Step 5: Solve for x
    x = 238,493,749,386.48/412,985.20
  6. Step 6: Final answer
    x = 577,487.40

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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.