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Finding the Fourth Proportional to 256,666.01, 354,201.30 and 143,488.76

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Solution

The fourth proportional to 256,666.01, 354,201.30 and 143,488.76 is: 198,015.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,666.01 : 354,201.30 = 143,488.76 : x
  2. Step 2: Convert to fraction form
    256,666.01/354,201.30 = 143,488.76/x
  3. Step 3: Cross multiply
    256,666.01x = 354,201.30 × 143,488.76
  4. Step 4: Simplify right side
    256,666.01x = 50,823,903,556.38
  5. Step 5: Solve for x
    x = 50,823,903,556.38/256,666.01
  6. Step 6: Final answer
    x = 198,015.72

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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.