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Finding the Fourth Proportional to 430,586.70, 645,880.05 and 243,962.70

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Solution

The fourth proportional to 430,586.70, 645,880.05 and 243,962.70 is: 365,944.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,586.70 : 645,880.05 = 243,962.70 : x
  2. Step 2: Convert to fraction form
    430,586.70/645,880.05 = 243,962.70/x
  3. Step 3: Cross multiply
    430,586.70x = 645,880.05 × 243,962.70
  4. Step 4: Simplify right side
    430,586.70x = 157,570,640,874.14
  5. Step 5: Solve for x
    x = 157,570,640,874.14/430,586.70
  6. Step 6: Final answer
    x = 365,944.05

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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.