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Finding the Fourth Proportional to 256,660.21, 384,990.50 and 69,671.71

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Solution

The fourth proportional to 256,660.21, 384,990.50 and 69,671.71 is: 104,507.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,660.21 : 384,990.50 = 69,671.71 : x
  2. Step 2: Convert to fraction form
    256,660.21/384,990.50 = 69,671.71/x
  3. Step 3: Cross multiply
    256,660.21x = 384,990.50 × 69,671.71
  4. Step 4: Simplify right side
    256,660.21x = 26,822,946,468.76
  5. Step 5: Solve for x
    x = 26,822,946,468.76/256,660.21
  6. Step 6: Final answer
    x = 104,507.62

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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.