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Finding the Fourth Proportional to 645,627.20, 968,440.80 and 393,684.80

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Solution

The fourth proportional to 645,627.20, 968,440.80 and 393,684.80 is: 590,527.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,627.20 : 968,440.80 = 393,684.80 : x
  2. Step 2: Convert to fraction form
    645,627.20/968,440.80 = 393,684.80/x
  3. Step 3: Cross multiply
    645,627.20x = 968,440.80 × 393,684.80
  4. Step 4: Simplify right side
    645,627.20x = 381,260,422,659.84
  5. Step 5: Solve for x
    x = 381,260,422,659.84/645,627.20
  6. Step 6: Final answer
    x = 590,527.20

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Half scale
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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.