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Finding the Fourth Proportional to 554.08, 829.68 and 518.08

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Solution

The fourth proportional to 554.08, 829.68 and 518.08 is: 775.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.08 : 829.68 = 518.08 : x
  2. Step 2: Convert to fraction form
    554.08/829.68 = 518.08/x
  3. Step 3: Cross multiply
    554.08x = 829.68 × 518.08
  4. Step 4: Simplify right side
    554.08x = 429,840.61
  5. Step 5: Solve for x
    x = 429,840.61/554.08
  6. Step 6: Final answer
    x = 775.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.