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Finding the Fourth Proportional to 556.14, 767.38 and 346.45

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Solution

The fourth proportional to 556.14, 767.38 and 346.45 is: 478.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.14 : 767.38 = 346.45 : x
  2. Step 2: Convert to fraction form
    556.14/767.38 = 346.45/x
  3. Step 3: Cross multiply
    556.14x = 767.38 × 346.45
  4. Step 4: Simplify right side
    556.14x = 265,858.80
  5. Step 5: Solve for x
    x = 265,858.80/556.14
  6. Step 6: Final answer
    x = 478.04

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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.