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Finding the Fourth Proportional to 1,237.87, 1,708.19 and 907.69

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Solution

The fourth proportional to 1,237.87, 1,708.19 and 907.69 is: 1,252.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.87 : 1,708.19 = 907.69 : x
  2. Step 2: Convert to fraction form
    1,237.87/1,708.19 = 907.69/x
  3. Step 3: Cross multiply
    1,237.87x = 1,708.19 × 907.69
  4. Step 4: Simplify right side
    1,237.87x = 1,550,506.98
  5. Step 5: Solve for x
    x = 1,550,506.98/1,237.87
  6. Step 6: Final answer
    x = 1,252.56

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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.