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Finding the Fourth Proportional to 256,876.84, 354,489.54 and 143,699.59

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Solution

The fourth proportional to 256,876.84, 354,489.54 and 143,699.59 is: 198,305.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,876.84 : 354,489.54 = 143,699.59 : x
  2. Step 2: Convert to fraction form
    256,876.84/354,489.54 = 143,699.59/x
  3. Step 3: Cross multiply
    256,876.84x = 354,489.54 × 143,699.59
  4. Step 4: Simplify right side
    256,876.84x = 50,940,000,132.19
  5. Step 5: Solve for x
    x = 50,940,000,132.19/256,876.84
  6. Step 6: Final answer
    x = 198,305.15

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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.