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Finding the Fourth Proportional to 1,237.22, 1,707.20 and 739.76

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Solution

The fourth proportional to 1,237.22, 1,707.20 and 739.76 is: 1,020.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.22 : 1,707.20 = 739.76 : x
  2. Step 2: Convert to fraction form
    1,237.22/1,707.20 = 739.76/x
  3. Step 3: Cross multiply
    1,237.22x = 1,707.20 × 739.76
  4. Step 4: Simplify right side
    1,237.22x = 1,262,915.69
  5. Step 5: Solve for x
    x = 1,262,915.69/1,237.22
  6. Step 6: Final answer
    x = 1,020.77

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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.