Home / 427,237.20-640,855.80-409,035.60

Finding the Fourth Proportional to 427,237.20, 640,855.80 and 409,035.60

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Solution

The fourth proportional to 427,237.20, 640,855.80 and 409,035.60 is: 613,553.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,237.20 : 640,855.80 = 409,035.60 : x
  2. Step 2: Convert to fraction form
    427,237.20/640,855.80 = 409,035.60/x
  3. Step 3: Cross multiply
    427,237.20x = 640,855.80 × 409,035.60
  4. Step 4: Simplify right side
    427,237.20x = 262,132,836,666.48
  5. Step 5: Solve for x
    x = 262,132,836,666.48/427,237.20
  6. Step 6: Final answer
    x = 613,553.40

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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.