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Finding the Fourth Proportional to 389.01, 536.99 and 272.64

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Solution

The fourth proportional to 389.01, 536.99 and 272.64 is: 376.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.01 : 536.99 = 272.64 : x
  2. Step 2: Convert to fraction form
    389.01/536.99 = 272.64/x
  3. Step 3: Cross multiply
    389.01x = 536.99 × 272.64
  4. Step 4: Simplify right side
    389.01x = 146,403.59
  5. Step 5: Solve for x
    x = 146,403.59/389.01
  6. Step 6: Final answer
    x = 376.35

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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.