Home / 645,624.20-968,436.30-393,681.80

Finding the Fourth Proportional to 645,624.20, 968,436.30 and 393,681.80

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Solution

The fourth proportional to 645,624.20, 968,436.30 and 393,681.80 is: 590,522.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,624.20 : 968,436.30 = 393,681.80 : x
  2. Step 2: Convert to fraction form
    645,624.20/968,436.30 = 393,681.80/x
  3. Step 3: Cross multiply
    645,624.20x = 968,436.30 × 393,681.80
  4. Step 4: Simplify right side
    645,624.20x = 381,255,745,769.34
  5. Step 5: Solve for x
    x = 381,255,745,769.34/645,624.20
  6. Step 6: Final answer
    x = 590,522.70

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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.