Home / 1,317.08-1,975.39-439.50

Finding the Fourth Proportional to 1,317.08, 1,975.39 and 439.50

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Solution

The fourth proportional to 1,317.08, 1,975.39 and 439.50 is: 659.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.08 : 1,975.39 = 439.50 : x
  2. Step 2: Convert to fraction form
    1,317.08/1,975.39 = 439.50/x
  3. Step 3: Cross multiply
    1,317.08x = 1,975.39 × 439.50
  4. Step 4: Simplify right side
    1,317.08x = 868,183.91
  5. Step 5: Solve for x
    x = 868,183.91/1,317.08
  6. Step 6: Final answer
    x = 659.17

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1.5x scale

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.