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Finding the Fourth Proportional to 256,672.70, 385,074.66 and 98,858.78

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Solution

The fourth proportional to 256,672.70, 385,074.66 and 98,858.78 is: 148,313.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,672.70 : 385,074.66 = 98,858.78 : x
  2. Step 2: Convert to fraction form
    256,672.70/385,074.66 = 98,858.78/x
  3. Step 3: Cross multiply
    256,672.70x = 385,074.66 × 98,858.78
  4. Step 4: Simplify right side
    256,672.70x = 38,068,011,096.51
  5. Step 5: Solve for x
    x = 38,068,011,096.51/256,672.70
  6. Step 6: Final answer
    x = 148,313.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.