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Finding the Fourth Proportional to 664.88, 917.48 and 554.08

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Solution

The fourth proportional to 664.88, 917.48 and 554.08 is: 764.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.88 : 917.48 = 554.08 : x
  2. Step 2: Convert to fraction form
    664.88/917.48 = 554.08/x
  3. Step 3: Cross multiply
    664.88x = 917.48 × 554.08
  4. Step 4: Simplify right side
    664.88x = 508,357.32
  5. Step 5: Solve for x
    x = 508,357.32/664.88
  6. Step 6: Final answer
    x = 764.59

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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.