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Finding the Fourth Proportional to 256,721.40, 354,274.56 and 143,544.96

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Solution

The fourth proportional to 256,721.40, 354,274.56 and 143,544.96 is: 198,091.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,721.40 : 354,274.56 = 143,544.96 : x
  2. Step 2: Convert to fraction form
    256,721.40/354,274.56 = 143,544.96/x
  3. Step 3: Cross multiply
    256,721.40x = 354,274.56 × 143,544.96
  4. Step 4: Simplify right side
    256,721.40x = 50,854,327,544.22
  5. Step 5: Solve for x
    x = 50,854,327,544.22/256,721.40
  6. Step 6: Final answer
    x = 198,091.50

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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.