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Finding the Fourth Proportional to 551.53, 761.12 and 302.86

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Solution

The fourth proportional to 551.53, 761.12 and 302.86 is: 417.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.53 : 761.12 = 302.86 : x
  2. Step 2: Convert to fraction form
    551.53/761.12 = 302.86/x
  3. Step 3: Cross multiply
    551.53x = 761.12 × 302.86
  4. Step 4: Simplify right side
    551.53x = 230,511.24
  5. Step 5: Solve for x
    x = 230,511.24/551.53
  6. Step 6: Final answer
    x = 417.95

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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.