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Finding the Fourth Proportional to 817.81, 1,128 and 537.96

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Solution

The fourth proportional to 817.81, 1,128 and 537.96 is: 742.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.81 : 1,128 = 537.96 : x
  2. Step 2: Convert to fraction form
    817.81/1,128 = 537.96/x
  3. Step 3: Cross multiply
    817.81x = 1,128 × 537.96
  4. Step 4: Simplify right side
    817.81x = 606,813.24
  5. Step 5: Solve for x
    x = 606,813.24/817.81
  6. Step 6: Final answer
    x = 742.00

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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.