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Finding the Fourth Proportional to 403.31, 556.47 and 263.60

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Solution

The fourth proportional to 403.31, 556.47 and 263.60 is: 363.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.31 : 556.47 = 263.60 : x
  2. Step 2: Convert to fraction form
    403.31/556.47 = 263.60/x
  3. Step 3: Cross multiply
    403.31x = 556.47 × 263.60
  4. Step 4: Simplify right side
    403.31x = 146,682.71
  5. Step 5: Solve for x
    x = 146,682.71/403.31
  6. Step 6: Final answer
    x = 363.70

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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.