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Finding the Fourth Proportional to 405.03, 558.63 and 272.39

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Solution

The fourth proportional to 405.03, 558.63 and 272.39 is: 375.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.03 : 558.63 = 272.39 : x
  2. Step 2: Convert to fraction form
    405.03/558.63 = 272.39/x
  3. Step 3: Cross multiply
    405.03x = 558.63 × 272.39
  4. Step 4: Simplify right side
    405.03x = 152,164.54
  5. Step 5: Solve for x
    x = 152,164.54/405.03
  6. Step 6: Final answer
    x = 375.69

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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.