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Finding the Fourth Proportional to 1,320.33, 1,980.90 and 832.71

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Solution

The fourth proportional to 1,320.33, 1,980.90 and 832.71 is: 1,249.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.33 : 1,980.90 = 832.71 : x
  2. Step 2: Convert to fraction form
    1,320.33/1,980.90 = 832.71/x
  3. Step 3: Cross multiply
    1,320.33x = 1,980.90 × 832.71
  4. Step 4: Simplify right side
    1,320.33x = 1,649,515.24
  5. Step 5: Solve for x
    x = 1,649,515.24/1,320.33
  6. Step 6: Final answer
    x = 1,249.32

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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.