Home / 1,317.93-1,975.50-440.21

Finding the Fourth Proportional to 1,317.93, 1,975.50 and 440.21

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Solution

The fourth proportional to 1,317.93, 1,975.50 and 440.21 is: 659.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.93 : 1,975.50 = 440.21 : x
  2. Step 2: Convert to fraction form
    1,317.93/1,975.50 = 440.21/x
  3. Step 3: Cross multiply
    1,317.93x = 1,975.50 × 440.21
  4. Step 4: Simplify right side
    1,317.93x = 869,634.86
  5. Step 5: Solve for x
    x = 869,634.86/1,317.93
  6. Step 6: Final answer
    x = 659.85

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Double scale
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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.