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Finding the Fourth Proportional to 404.76, 607.91 and 251.76

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Solution

The fourth proportional to 404.76, 607.91 and 251.76 is: 378.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.76 : 607.91 = 251.76 : x
  2. Step 2: Convert to fraction form
    404.76/607.91 = 251.76/x
  3. Step 3: Cross multiply
    404.76x = 607.91 × 251.76
  4. Step 4: Simplify right side
    404.76x = 153,045.77
  5. Step 5: Solve for x
    x = 153,045.77/404.76
  6. Step 6: Final answer
    x = 378.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.