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Finding the Fourth Proportional to 821.73, 1,133.98 and 448.71

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Solution

The fourth proportional to 821.73, 1,133.98 and 448.71 is: 619.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.73 : 1,133.98 = 448.71 : x
  2. Step 2: Convert to fraction form
    821.73/1,133.98 = 448.71/x
  3. Step 3: Cross multiply
    821.73x = 1,133.98 × 448.71
  4. Step 4: Simplify right side
    821.73x = 508,829.29
  5. Step 5: Solve for x
    x = 508,829.29/821.73
  6. Step 6: Final answer
    x = 619.22

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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.