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Finding the Fourth Proportional to 1,237.15, 1,707.01 and 739.60

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Solution

The fourth proportional to 1,237.15, 1,707.01 and 739.60 is: 1,020.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.15 : 1,707.01 = 739.60 : x
  2. Step 2: Convert to fraction form
    1,237.15/1,707.01 = 739.60/x
  3. Step 3: Cross multiply
    1,237.15x = 1,707.01 × 739.60
  4. Step 4: Simplify right side
    1,237.15x = 1,262,504.60
  5. Step 5: Solve for x
    x = 1,262,504.60/1,237.15
  6. Step 6: Final answer
    x = 1,020.49

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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.