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Finding the Fourth Proportional to 551.51, 761.09 and 302.84

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Solution

The fourth proportional to 551.51, 761.09 and 302.84 is: 417.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.51 : 761.09 = 302.84 : x
  2. Step 2: Convert to fraction form
    551.51/761.09 = 302.84/x
  3. Step 3: Cross multiply
    551.51x = 761.09 × 302.84
  4. Step 4: Simplify right side
    551.51x = 230,486.98
  5. Step 5: Solve for x
    x = 230,486.98/551.51
  6. Step 6: Final answer
    x = 417.92

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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.