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Finding the Fourth Proportional to 556.16, 767.45 and 320.18

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Solution

The fourth proportional to 556.16, 767.45 and 320.18 is: 441.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.16 : 767.45 = 320.18 : x
  2. Step 2: Convert to fraction form
    556.16/767.45 = 320.18/x
  3. Step 3: Cross multiply
    556.16x = 767.45 × 320.18
  4. Step 4: Simplify right side
    556.16x = 245,719.10
  5. Step 5: Solve for x
    x = 245,719.10/556.16
  6. Step 6: Final answer
    x = 441.82

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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.