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Finding the Fourth Proportional to 1,237.52, 1,707.72 and 739.96

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Solution

The fourth proportional to 1,237.52, 1,707.72 and 739.96 is: 1,021.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.52 : 1,707.72 = 739.96 : x
  2. Step 2: Convert to fraction form
    1,237.52/1,707.72 = 739.96/x
  3. Step 3: Cross multiply
    1,237.52x = 1,707.72 × 739.96
  4. Step 4: Simplify right side
    1,237.52x = 1,263,644.49
  5. Step 5: Solve for x
    x = 1,263,644.49/1,237.52
  6. Step 6: Final answer
    x = 1,021.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.