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Finding the Fourth Proportional to 885.81, 1,222.49 and 492.84

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Solution

The fourth proportional to 885.81, 1,222.49 and 492.84 is: 680.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.81 : 1,222.49 = 492.84 : x
  2. Step 2: Convert to fraction form
    885.81/1,222.49 = 492.84/x
  3. Step 3: Cross multiply
    885.81x = 1,222.49 × 492.84
  4. Step 4: Simplify right side
    885.81x = 602,489.51
  5. Step 5: Solve for x
    x = 602,489.51/885.81
  6. Step 6: Final answer
    x = 680.16

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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.