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Finding the Fourth Proportional to 556.75, 768.31 and 308.07

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Solution

The fourth proportional to 556.75, 768.31 and 308.07 is: 425.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.75 : 768.31 = 308.07 : x
  2. Step 2: Convert to fraction form
    556.75/768.31 = 308.07/x
  3. Step 3: Cross multiply
    556.75x = 768.31 × 308.07
  4. Step 4: Simplify right side
    556.75x = 236,693.26
  5. Step 5: Solve for x
    x = 236,693.26/556.75
  6. Step 6: Final answer
    x = 425.13

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Find fourth proportional to 278.38, 384.16 and 154.04
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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.