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Finding the Fourth Proportional to 551.88, 761.93 and 355.74

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Solution

The fourth proportional to 551.88, 761.93 and 355.74 is: 491.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.88 : 761.93 = 355.74 : x
  2. Step 2: Convert to fraction form
    551.88/761.93 = 355.74/x
  3. Step 3: Cross multiply
    551.88x = 761.93 × 355.74
  4. Step 4: Simplify right side
    551.88x = 271,043.39
  5. Step 5: Solve for x
    x = 271,043.39/551.88
  6. Step 6: Final answer
    x = 491.13

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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.