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Finding the Fourth Proportional to 256,606.80, 384,910.20 and 69,618.30

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Solution

The fourth proportional to 256,606.80, 384,910.20 and 69,618.30 is: 104,427.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,606.80 : 384,910.20 = 69,618.30 : x
  2. Step 2: Convert to fraction form
    256,606.80/384,910.20 = 69,618.30/x
  3. Step 3: Cross multiply
    256,606.80x = 384,910.20 × 69,618.30
  4. Step 4: Simplify right side
    256,606.80x = 26,796,793,776.66
  5. Step 5: Solve for x
    x = 26,796,793,776.66/256,606.80
  6. Step 6: Final answer
    x = 104,427.45

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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.