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Finding the Fourth Proportional to 1,480.65, 2,043.32 and 817.56

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Solution

The fourth proportional to 1,480.65, 2,043.32 and 817.56 is: 1,128.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.65 : 2,043.32 = 817.56 : x
  2. Step 2: Convert to fraction form
    1,480.65/2,043.32 = 817.56/x
  3. Step 3: Cross multiply
    1,480.65x = 2,043.32 × 817.56
  4. Step 4: Simplify right side
    1,480.65x = 1,670,532.61
  5. Step 5: Solve for x
    x = 1,670,532.61/1,480.65
  6. Step 6: Final answer
    x = 1,128.25

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1.5x scale

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.