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Finding the Fourth Proportional to 819.28, 1,130.83 and 504.77

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Solution

The fourth proportional to 819.28, 1,130.83 and 504.77 is: 696.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.28 : 1,130.83 = 504.77 : x
  2. Step 2: Convert to fraction form
    819.28/1,130.83 = 504.77/x
  3. Step 3: Cross multiply
    819.28x = 1,130.83 × 504.77
  4. Step 4: Simplify right side
    819.28x = 570,802.14
  5. Step 5: Solve for x
    x = 570,802.14/819.28
  6. Step 6: Final answer
    x = 696.71

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Double scale
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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.