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Finding the Fourth Proportional to 256,659.21, 384,989.00 and 69,670.71

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Solution

The fourth proportional to 256,659.21, 384,989.00 and 69,670.71 is: 104,506.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,659.21 : 384,989.00 = 69,670.71 : x
  2. Step 2: Convert to fraction form
    256,659.21/384,989.00 = 69,670.71/x
  3. Step 3: Cross multiply
    256,659.21x = 384,989.00 × 69,670.71
  4. Step 4: Simplify right side
    256,659.21x = 26,822,456,623.84
  5. Step 5: Solve for x
    x = 26,822,456,623.84/256,659.21
  6. Step 6: Final answer
    x = 104,506.11

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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.