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Finding the Fourth Proportional to 256,915.08, 354,543.12 and 143,737.92

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Solution

The fourth proportional to 256,915.08, 354,543.12 and 143,737.92 is: 198,358.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,915.08 : 354,543.12 = 143,737.92 : x
  2. Step 2: Convert to fraction form
    256,915.08/354,543.12 = 143,737.92/x
  3. Step 3: Cross multiply
    256,915.08x = 354,543.12 × 143,737.92
  4. Step 4: Simplify right side
    256,915.08x = 50,961,290,619.11
  5. Step 5: Solve for x
    x = 50,961,290,619.11/256,915.08
  6. Step 6: Final answer
    x = 198,358.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.