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Finding the Fourth Proportional to 551.05, 760.47 and 302.38

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Solution

The fourth proportional to 551.05, 760.47 and 302.38 is: 417.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.05 : 760.47 = 302.38 : x
  2. Step 2: Convert to fraction form
    551.05/760.47 = 302.38/x
  3. Step 3: Cross multiply
    551.05x = 760.47 × 302.38
  4. Step 4: Simplify right side
    551.05x = 229,950.92
  5. Step 5: Solve for x
    x = 229,950.92/551.05
  6. Step 6: Final answer
    x = 417.30

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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.