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Finding the Fourth Proportional to 551.87, 761.56 and 303.19

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Solution

The fourth proportional to 551.87, 761.56 and 303.19 is: 418.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.87 : 761.56 = 303.19 : x
  2. Step 2: Convert to fraction form
    551.87/761.56 = 303.19/x
  3. Step 3: Cross multiply
    551.87x = 761.56 × 303.19
  4. Step 4: Simplify right side
    551.87x = 230,894.71
  5. Step 5: Solve for x
    x = 230,894.71/551.87
  6. Step 6: Final answer
    x = 418.39

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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.