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Finding the Fourth Proportional to 403.08, 556.18 and 265

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Solution

The fourth proportional to 403.08, 556.18 and 265 is: 365.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.08 : 556.18 = 265 : x
  2. Step 2: Convert to fraction form
    403.08/556.18 = 265/x
  3. Step 3: Cross multiply
    403.08x = 556.18 × 265
  4. Step 4: Simplify right side
    403.08x = 147,387.70
  5. Step 5: Solve for x
    x = 147,387.70/403.08
  6. Step 6: Final answer
    x = 365.65

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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.