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Finding the Fourth Proportional to 759.30, 1,136.92 and 411

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Solution

The fourth proportional to 759.30, 1,136.92 and 411 is: 615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.30 : 1,136.92 = 411 : x
  2. Step 2: Convert to fraction form
    759.30/1,136.92 = 411/x
  3. Step 3: Cross multiply
    759.30x = 1,136.92 × 411
  4. Step 4: Simplify right side
    759.30x = 467,274.12
  5. Step 5: Solve for x
    x = 467,274.12/759.30
  6. Step 6: Final answer
    x = 615.40

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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.