Home / 1,317.50-1,976.36-439.98

Finding the Fourth Proportional to 1,317.50, 1,976.36 and 439.98

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Solution

The fourth proportional to 1,317.50, 1,976.36 and 439.98 is: 660.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.50 : 1,976.36 = 439.98 : x
  2. Step 2: Convert to fraction form
    1,317.50/1,976.36 = 439.98/x
  3. Step 3: Cross multiply
    1,317.50x = 1,976.36 × 439.98
  4. Step 4: Simplify right side
    1,317.50x = 869,558.87
  5. Step 5: Solve for x
    x = 869,558.87/1,317.50
  6. Step 6: Final answer
    x = 660.01

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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.