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Finding the Fourth Proportional to 1,135.21, 1,702.89 and 404.59

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Solution

The fourth proportional to 1,135.21, 1,702.89 and 404.59 is: 606.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.21 : 1,702.89 = 404.59 : x
  2. Step 2: Convert to fraction form
    1,135.21/1,702.89 = 404.59/x
  3. Step 3: Cross multiply
    1,135.21x = 1,702.89 × 404.59
  4. Step 4: Simplify right side
    1,135.21x = 688,972.27
  5. Step 5: Solve for x
    x = 688,972.27/1,135.21
  6. Step 6: Final answer
    x = 606.91

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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.