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Finding the Fourth Proportional to 540.09, 744.59 and 399.93

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Solution

The fourth proportional to 540.09, 744.59 and 399.93 is: 551.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.09 : 744.59 = 399.93 : x
  2. Step 2: Convert to fraction form
    540.09/744.59 = 399.93/x
  3. Step 3: Cross multiply
    540.09x = 744.59 × 399.93
  4. Step 4: Simplify right side
    540.09x = 297,781.88
  5. Step 5: Solve for x
    x = 297,781.88/540.09
  6. Step 6: Final answer
    x = 551.36

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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.