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Finding the Fourth Proportional to 551.88, 761.84 and 355.50

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Solution

The fourth proportional to 551.88, 761.84 and 355.50 is: 490.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.88 : 761.84 = 355.50 : x
  2. Step 2: Convert to fraction form
    551.88/761.84 = 355.50/x
  3. Step 3: Cross multiply
    551.88x = 761.84 × 355.50
  4. Step 4: Simplify right side
    551.88x = 270,834.12
  5. Step 5: Solve for x
    x = 270,834.12/551.88
  6. Step 6: Final answer
    x = 490.75

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.