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Finding the Fourth Proportional to 1,480.91, 2,043.75 and 817.76

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Solution

The fourth proportional to 1,480.91, 2,043.75 and 817.76 is: 1,128.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.91 : 2,043.75 = 817.76 : x
  2. Step 2: Convert to fraction form
    1,480.91/2,043.75 = 817.76/x
  3. Step 3: Cross multiply
    1,480.91x = 2,043.75 × 817.76
  4. Step 4: Simplify right side
    1,480.91x = 1,671,297
  5. Step 5: Solve for x
    x = 1,671,297/1,480.91
  6. Step 6: Final answer
    x = 1,128.56

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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.