Home / 1,315.23-1,969.24-1,280.37

Finding the Fourth Proportional to 1,315.23, 1,969.24 and 1,280.37

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Solution

The fourth proportional to 1,315.23, 1,969.24 and 1,280.37 is: 1,917.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.23 : 1,969.24 = 1,280.37 : x
  2. Step 2: Convert to fraction form
    1,315.23/1,969.24 = 1,280.37/x
  3. Step 3: Cross multiply
    1,315.23x = 1,969.24 × 1,280.37
  4. Step 4: Simplify right side
    1,315.23x = 2,521,349.42
  5. Step 5: Solve for x
    x = 2,521,349.42/1,315.23
  6. Step 6: Final answer
    x = 1,917.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.