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Finding the Fourth Proportional to 403.14, 607.56 and 399.51

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Solution

The fourth proportional to 403.14, 607.56 and 399.51 is: 602.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.14 : 607.56 = 399.51 : x
  2. Step 2: Convert to fraction form
    403.14/607.56 = 399.51/x
  3. Step 3: Cross multiply
    403.14x = 607.56 × 399.51
  4. Step 4: Simplify right side
    403.14x = 242,726.30
  5. Step 5: Solve for x
    x = 242,726.30/403.14
  6. Step 6: Final answer
    x = 602.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.