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Finding the Fourth Proportional to 885.98, 1,223.43 and 554.97

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Solution

The fourth proportional to 885.98, 1,223.43 and 554.97 is: 766.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.98 : 1,223.43 = 554.97 : x
  2. Step 2: Convert to fraction form
    885.98/1,223.43 = 554.97/x
  3. Step 3: Cross multiply
    885.98x = 1,223.43 × 554.97
  4. Step 4: Simplify right side
    885.98x = 678,966.95
  5. Step 5: Solve for x
    x = 678,966.95/885.98
  6. Step 6: Final answer
    x = 766.35

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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.