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Finding the Fourth Proportional to 256,779.12, 354,371.64 and 143,602.68

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Solution

The fourth proportional to 256,779.12, 354,371.64 and 143,602.68 is: 198,180.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,779.12 : 354,371.64 = 143,602.68 : x
  2. Step 2: Convert to fraction form
    256,779.12/354,371.64 = 143,602.68/x
  3. Step 3: Cross multiply
    256,779.12x = 354,371.64 × 143,602.68
  4. Step 4: Simplify right side
    256,779.12x = 50,888,717,220.00
  5. Step 5: Solve for x
    x = 50,888,717,220.00/256,779.12
  6. Step 6: Final answer
    x = 198,180.90

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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.