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Finding the Fourth Proportional to 746.49, 1,120.19 and 284.34

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Solution

The fourth proportional to 746.49, 1,120.19 and 284.34 is: 426.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.49 : 1,120.19 = 284.34 : x
  2. Step 2: Convert to fraction form
    746.49/1,120.19 = 284.34/x
  3. Step 3: Cross multiply
    746.49x = 1,120.19 × 284.34
  4. Step 4: Simplify right side
    746.49x = 318,514.82
  5. Step 5: Solve for x
    x = 318,514.82/746.49
  6. Step 6: Final answer
    x = 426.68

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Double scale
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1.5x scale

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.