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Finding the Fourth Proportional to 842.50, 1,262.05 and 404.16

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Solution

The fourth proportional to 842.50, 1,262.05 and 404.16 is: 605.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.50 : 1,262.05 = 404.16 : x
  2. Step 2: Convert to fraction form
    842.50/1,262.05 = 404.16/x
  3. Step 3: Cross multiply
    842.50x = 1,262.05 × 404.16
  4. Step 4: Simplify right side
    842.50x = 510,064.38
  5. Step 5: Solve for x
    x = 510,064.38/842.50
  6. Step 6: Final answer
    x = 605.42

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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.