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Finding the Fourth Proportional to 556.56, 767.76 and 346.77

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Solution

The fourth proportional to 556.56, 767.76 and 346.77 is: 478.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.56 : 767.76 = 346.77 : x
  2. Step 2: Convert to fraction form
    556.56/767.76 = 346.77/x
  3. Step 3: Cross multiply
    556.56x = 767.76 × 346.77
  4. Step 4: Simplify right side
    556.56x = 266,236.14
  5. Step 5: Solve for x
    x = 266,236.14/556.56
  6. Step 6: Final answer
    x = 478.36

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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.