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Finding the Fourth Proportional to 832.89, 1,149.42 and 459.87

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Solution

The fourth proportional to 832.89, 1,149.42 and 459.87 is: 634.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.89 : 1,149.42 = 459.87 : x
  2. Step 2: Convert to fraction form
    832.89/1,149.42 = 459.87/x
  3. Step 3: Cross multiply
    832.89x = 1,149.42 × 459.87
  4. Step 4: Simplify right side
    832.89x = 528,583.78
  5. Step 5: Solve for x
    x = 528,583.78/832.89
  6. Step 6: Final answer
    x = 634.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.