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Finding the Fourth Proportional to 403.17, 556.64 and 253.86

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Solution

The fourth proportional to 403.17, 556.64 and 253.86 is: 350.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.17 : 556.64 = 253.86 : x
  2. Step 2: Convert to fraction form
    403.17/556.64 = 253.86/x
  3. Step 3: Cross multiply
    403.17x = 556.64 × 253.86
  4. Step 4: Simplify right side
    403.17x = 141,304.58
  5. Step 5: Solve for x
    x = 141,304.58/403.17
  6. Step 6: Final answer
    x = 350.49

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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.