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Finding the Fourth Proportional to 256,838.13, 354,437.90 and 143,660.88

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Solution

The fourth proportional to 256,838.13, 354,437.90 and 143,660.88 is: 198,252.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,838.13 : 354,437.90 = 143,660.88 : x
  2. Step 2: Convert to fraction form
    256,838.13/354,437.90 = 143,660.88/x
  3. Step 3: Cross multiply
    256,838.13x = 354,437.90 × 143,660.88
  4. Step 4: Simplify right side
    256,838.13x = 50,918,858,128.86
  5. Step 5: Solve for x
    x = 50,918,858,128.86/256,838.13
  6. Step 6: Final answer
    x = 198,252.72

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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.