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Finding the Fourth Proportional to 256,814.94, 354,402.69 and 143,637.69

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Solution

The fourth proportional to 256,814.94, 354,402.69 and 143,637.69 is: 198,218.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,814.94 : 354,402.69 = 143,637.69 : x
  2. Step 2: Convert to fraction form
    256,814.94/354,402.69 = 143,637.69/x
  3. Step 3: Cross multiply
    256,814.94x = 354,402.69 × 143,637.69
  4. Step 4: Simplify right side
    256,814.94x = 50,905,583,721.39
  5. Step 5: Solve for x
    x = 50,905,583,721.39/256,814.94
  6. Step 6: Final answer
    x = 198,218.93

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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.