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Finding the Fourth Proportional to 556.79, 767.87 and 357.39

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Solution

The fourth proportional to 556.79, 767.87 and 357.39 is: 492.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.79 : 767.87 = 357.39 : x
  2. Step 2: Convert to fraction form
    556.79/767.87 = 357.39/x
  3. Step 3: Cross multiply
    556.79x = 767.87 × 357.39
  4. Step 4: Simplify right side
    556.79x = 274,431.49
  5. Step 5: Solve for x
    x = 274,431.49/556.79
  6. Step 6: Final answer
    x = 492.88

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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.