Home / 645,724.80-968,587.20-409,334.40

Finding the Fourth Proportional to 645,724.80, 968,587.20 and 409,334.40

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Solution

The fourth proportional to 645,724.80, 968,587.20 and 409,334.40 is: 614,001.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,724.80 : 968,587.20 = 409,334.40 : x
  2. Step 2: Convert to fraction form
    645,724.80/968,587.20 = 409,334.40/x
  3. Step 3: Cross multiply
    645,724.80x = 968,587.20 × 409,334.40
  4. Step 4: Simplify right side
    645,724.80x = 396,476,060,359.68
  5. Step 5: Solve for x
    x = 396,476,060,359.68/645,724.80
  6. Step 6: Final answer
    x = 614,001.60

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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.