Home / 1,708.11-2,357.31-1,287.72

Finding the Fourth Proportional to 1,708.11, 2,357.31 and 1,287.72

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Solution

The fourth proportional to 1,708.11, 2,357.31 and 1,287.72 is: 1,777.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,708.11 : 2,357.31 = 1,287.72 : x
  2. Step 2: Convert to fraction form
    1,708.11/2,357.31 = 1,287.72/x
  3. Step 3: Cross multiply
    1,708.11x = 2,357.31 × 1,287.72
  4. Step 4: Simplify right side
    1,708.11x = 3,035,561.13
  5. Step 5: Solve for x
    x = 3,035,561.13/1,708.11
  6. Step 6: Final answer
    x = 1,777.14

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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.