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Finding the Fourth Proportional to 1,136.15, 1,704.38 and 356.21

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Solution

The fourth proportional to 1,136.15, 1,704.38 and 356.21 is: 534.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.15 : 1,704.38 = 356.21 : x
  2. Step 2: Convert to fraction form
    1,136.15/1,704.38 = 356.21/x
  3. Step 3: Cross multiply
    1,136.15x = 1,704.38 × 356.21
  4. Step 4: Simplify right side
    1,136.15x = 607,117.20
  5. Step 5: Solve for x
    x = 607,117.20/1,136.15
  6. Step 6: Final answer
    x = 534.36

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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.