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Finding the Fourth Proportional to 1,135.76, 1,702.44 and 442.24

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Solution

The fourth proportional to 1,135.76, 1,702.44 and 442.24 is: 662.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.76 : 1,702.44 = 442.24 : x
  2. Step 2: Convert to fraction form
    1,135.76/1,702.44 = 442.24/x
  3. Step 3: Cross multiply
    1,135.76x = 1,702.44 × 442.24
  4. Step 4: Simplify right side
    1,135.76x = 752,887.07
  5. Step 5: Solve for x
    x = 752,887.07/1,135.76
  6. Step 6: Final answer
    x = 662.89

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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.