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Finding the Fourth Proportional to 556.75, 768.36 and 308.15

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Solution

The fourth proportional to 556.75, 768.36 and 308.15 is: 425.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.75 : 768.36 = 308.15 : x
  2. Step 2: Convert to fraction form
    556.75/768.36 = 308.15/x
  3. Step 3: Cross multiply
    556.75x = 768.36 × 308.15
  4. Step 4: Simplify right side
    556.75x = 236,771.34
  5. Step 5: Solve for x
    x = 236,771.34/556.75
  6. Step 6: Final answer
    x = 425.27

Related Problems

Find fourth proportional to 278.38, 384.18 and 154.08
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.