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Finding the Fourth Proportional to 256,668.80, 385,058.14 and 76,768.34

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Solution

The fourth proportional to 256,668.80, 385,058.14 and 76,768.34 is: 115,168.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,668.80 : 385,058.14 = 76,768.34 : x
  2. Step 2: Convert to fraction form
    256,668.80/385,058.14 = 76,768.34/x
  3. Step 3: Cross multiply
    256,668.80x = 385,058.14 × 76,768.34
  4. Step 4: Simplify right side
    256,668.80x = 29,560,272,094.08
  5. Step 5: Solve for x
    x = 29,560,272,094.08/256,668.80
  6. Step 6: Final answer
    x = 115,168.94

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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.