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Finding the Fourth Proportional to 554.38, 827.80 and 488

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Solution

The fourth proportional to 554.38, 827.80 and 488 is: 728.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.38 : 827.80 = 488 : x
  2. Step 2: Convert to fraction form
    554.38/827.80 = 488/x
  3. Step 3: Cross multiply
    554.38x = 827.80 × 488
  4. Step 4: Simplify right side
    554.38x = 403,966.40
  5. Step 5: Solve for x
    x = 403,966.40/554.38
  6. Step 6: Final answer
    x = 728.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.