Home / 1,317.55-1,814.46-986.77

Finding the Fourth Proportional to 1,317.55, 1,814.46 and 986.77

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Solution

The fourth proportional to 1,317.55, 1,814.46 and 986.77 is: 1,358.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.55 : 1,814.46 = 986.77 : x
  2. Step 2: Convert to fraction form
    1,317.55/1,814.46 = 986.77/x
  3. Step 3: Cross multiply
    1,317.55x = 1,814.46 × 986.77
  4. Step 4: Simplify right side
    1,317.55x = 1,790,454.69
  5. Step 5: Solve for x
    x = 1,790,454.69/1,317.55
  6. Step 6: Final answer
    x = 1,358.93

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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.