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Finding the Fourth Proportional to 256,394.06, 384,627.53 and 78,915.86

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Solution

The fourth proportional to 256,394.06, 384,627.53 and 78,915.86 is: 118,385.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,394.06 : 384,627.53 = 78,915.86 : x
  2. Step 2: Convert to fraction form
    256,394.06/384,627.53 = 78,915.86/x
  3. Step 3: Cross multiply
    256,394.06x = 384,627.53 × 78,915.86
  4. Step 4: Simplify right side
    256,394.06x = 30,353,209,991.91
  5. Step 5: Solve for x
    x = 30,353,209,991.91/256,394.06
  6. Step 6: Final answer
    x = 118,385.00

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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.