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Finding the Fourth Proportional to 256,655.32, 354,128.70 and 143,474.20

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Solution

The fourth proportional to 256,655.32, 354,128.70 and 143,474.20 is: 197,963.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,655.32 : 354,128.70 = 143,474.20 : x
  2. Step 2: Convert to fraction form
    256,655.32/354,128.70 = 143,474.20/x
  3. Step 3: Cross multiply
    256,655.32x = 354,128.70 × 143,474.20
  4. Step 4: Simplify right side
    256,655.32x = 50,808,331,929.54
  5. Step 5: Solve for x
    x = 50,808,331,929.54/256,655.32
  6. Step 6: Final answer
    x = 197,963.29

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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.