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Finding the Fourth Proportional to 1,262.24, 1,893.92 and 713.60

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Solution

The fourth proportional to 1,262.24, 1,893.92 and 713.60 is: 1,070.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.24 : 1,893.92 = 713.60 : x
  2. Step 2: Convert to fraction form
    1,262.24/1,893.92 = 713.60/x
  3. Step 3: Cross multiply
    1,262.24x = 1,893.92 × 713.60
  4. Step 4: Simplify right side
    1,262.24x = 1,351,501.31
  5. Step 5: Solve for x
    x = 1,351,501.31/1,262.24
  6. Step 6: Final answer
    x = 1,070.72

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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.