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Finding the Fourth Proportional to 488.07, 671.85 and 440.64

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Solution

The fourth proportional to 488.07, 671.85 and 440.64 is: 606.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.07 : 671.85 = 440.64 : x
  2. Step 2: Convert to fraction form
    488.07/671.85 = 440.64/x
  3. Step 3: Cross multiply
    488.07x = 671.85 × 440.64
  4. Step 4: Simplify right side
    488.07x = 296,043.98
  5. Step 5: Solve for x
    x = 296,043.98/488.07
  6. Step 6: Final answer
    x = 606.56

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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.