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Finding the Fourth Proportional to 256,585.48, 354,081.85 and 143,418.76

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Solution

The fourth proportional to 256,585.48, 354,081.85 and 143,418.76 is: 197,914.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,585.48 : 354,081.85 = 143,418.76 : x
  2. Step 2: Convert to fraction form
    256,585.48/354,081.85 = 143,418.76/x
  3. Step 3: Cross multiply
    256,585.48x = 354,081.85 × 143,418.76
  4. Step 4: Simplify right side
    256,585.48x = 50,781,979,148.41
  5. Step 5: Solve for x
    x = 50,781,979,148.41/256,585.48
  6. Step 6: Final answer
    x = 197,914.47

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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.