Home / 1,685.09-2,317.70-1,352.79

Finding the Fourth Proportional to 1,685.09, 2,317.70 and 1,352.79

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Solution

The fourth proportional to 1,685.09, 2,317.70 and 1,352.79 is: 1,860.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.09 : 2,317.70 = 1,352.79 : x
  2. Step 2: Convert to fraction form
    1,685.09/2,317.70 = 1,352.79/x
  3. Step 3: Cross multiply
    1,685.09x = 2,317.70 × 1,352.79
  4. Step 4: Simplify right side
    1,685.09x = 3,135,354.62
  5. Step 5: Solve for x
    x = 3,135,354.62/1,685.09
  6. Step 6: Final answer
    x = 1,860.65

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1.5x scale

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.