Home / 1,709.20-2,357.96-1,315.60

Finding the Fourth Proportional to 1,709.20, 2,357.96 and 1,315.60

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Solution

The fourth proportional to 1,709.20, 2,357.96 and 1,315.60 is: 1,814.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.20 : 2,357.96 = 1,315.60 : x
  2. Step 2: Convert to fraction form
    1,709.20/2,357.96 = 1,315.60/x
  3. Step 3: Cross multiply
    1,709.20x = 2,357.96 × 1,315.60
  4. Step 4: Simplify right side
    1,709.20x = 3,102,132.18
  5. Step 5: Solve for x
    x = 3,102,132.18/1,709.20
  6. Step 6: Final answer
    x = 1,814.96

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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.