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Finding the Fourth Proportional to 556.17, 767.54 and 320.19

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Solution

The fourth proportional to 556.17, 767.54 and 320.19 is: 441.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.17 : 767.54 = 320.19 : x
  2. Step 2: Convert to fraction form
    556.17/767.54 = 320.19/x
  3. Step 3: Cross multiply
    556.17x = 767.54 × 320.19
  4. Step 4: Simplify right side
    556.17x = 245,756.55
  5. Step 5: Solve for x
    x = 245,756.55/556.17
  6. Step 6: Final answer
    x = 441.88

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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.