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Finding the Fourth Proportional to 1,135.21, 1,702.47 and 404.62

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Solution

The fourth proportional to 1,135.21, 1,702.47 and 404.62 is: 606.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.21 : 1,702.47 = 404.62 : x
  2. Step 2: Convert to fraction form
    1,135.21/1,702.47 = 404.62/x
  3. Step 3: Cross multiply
    1,135.21x = 1,702.47 × 404.62
  4. Step 4: Simplify right side
    1,135.21x = 688,853.41
  5. Step 5: Solve for x
    x = 688,853.41/1,135.21
  6. Step 6: Final answer
    x = 606.81

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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.