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Finding the Fourth Proportional to 746.99, 1,120.37 and 284.78

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Solution

The fourth proportional to 746.99, 1,120.37 and 284.78 is: 427.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.99 : 1,120.37 = 284.78 : x
  2. Step 2: Convert to fraction form
    746.99/1,120.37 = 284.78/x
  3. Step 3: Cross multiply
    746.99x = 1,120.37 × 284.78
  4. Step 4: Simplify right side
    746.99x = 319,060.35
  5. Step 5: Solve for x
    x = 319,060.35/746.99
  6. Step 6: Final answer
    x = 427.13

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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.