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Finding the Fourth Proportional to 551.34, 759.18 and 539.19

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Solution

The fourth proportional to 551.34, 759.18 and 539.19 is: 742.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.34 : 759.18 = 539.19 : x
  2. Step 2: Convert to fraction form
    551.34/759.18 = 539.19/x
  3. Step 3: Cross multiply
    551.34x = 759.18 × 539.19
  4. Step 4: Simplify right side
    551.34x = 409,342.26
  5. Step 5: Solve for x
    x = 409,342.26/551.34
  6. Step 6: Final answer
    x = 742.45

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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.