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Finding the Fourth Proportional to 485.52, 668.01 and 438.94

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Solution

The fourth proportional to 485.52, 668.01 and 438.94 is: 603.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.52 : 668.01 = 438.94 : x
  2. Step 2: Convert to fraction form
    485.52/668.01 = 438.94/x
  3. Step 3: Cross multiply
    485.52x = 668.01 × 438.94
  4. Step 4: Simplify right side
    485.52x = 293,216.31
  5. Step 5: Solve for x
    x = 293,216.31/485.52
  6. Step 6: Final answer
    x = 603.92

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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.