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Finding the Fourth Proportional to 403.00, 556.15 and 285.18

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Solution

The fourth proportional to 403.00, 556.15 and 285.18 is: 393.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.00 : 556.15 = 285.18 : x
  2. Step 2: Convert to fraction form
    403.00/556.15 = 285.18/x
  3. Step 3: Cross multiply
    403.00x = 556.15 × 285.18
  4. Step 4: Simplify right side
    403.00x = 158,602.14
  5. Step 5: Solve for x
    x = 158,602.14/403.00
  6. Step 6: Final answer
    x = 393.56

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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.