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Finding the Fourth Proportional to 885.76, 1,222.52 and 554.40

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Solution

The fourth proportional to 885.76, 1,222.52 and 554.40 is: 765.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.76 : 1,222.52 = 554.40 : x
  2. Step 2: Convert to fraction form
    885.76/1,222.52 = 554.40/x
  3. Step 3: Cross multiply
    885.76x = 1,222.52 × 554.40
  4. Step 4: Simplify right side
    885.76x = 677,765.09
  5. Step 5: Solve for x
    x = 677,765.09/885.76
  6. Step 6: Final answer
    x = 765.18

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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.