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Finding the Fourth Proportional to 746.42, 1,118.96 and 259.14

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Solution

The fourth proportional to 746.42, 1,118.96 and 259.14 is: 388.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.42 : 1,118.96 = 259.14 : x
  2. Step 2: Convert to fraction form
    746.42/1,118.96 = 259.14/x
  3. Step 3: Cross multiply
    746.42x = 1,118.96 × 259.14
  4. Step 4: Simplify right side
    746.42x = 289,967.29
  5. Step 5: Solve for x
    x = 289,967.29/746.42
  6. Step 6: Final answer
    x = 388.48

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Double scale
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Similar ratio
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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.