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Finding the Fourth Proportional to 556.11, 767.46 and 320.13

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Solution

The fourth proportional to 556.11, 767.46 and 320.13 is: 441.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.11 : 767.46 = 320.13 : x
  2. Step 2: Convert to fraction form
    556.11/767.46 = 320.13/x
  3. Step 3: Cross multiply
    556.11x = 767.46 × 320.13
  4. Step 4: Simplify right side
    556.11x = 245,686.97
  5. Step 5: Solve for x
    x = 245,686.97/556.11
  6. Step 6: Final answer
    x = 441.80

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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.