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Finding the Fourth Proportional to 488.40, 729.07 and 415.48

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Solution

The fourth proportional to 488.40, 729.07 and 415.48 is: 620.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.40 : 729.07 = 415.48 : x
  2. Step 2: Convert to fraction form
    488.40/729.07 = 415.48/x
  3. Step 3: Cross multiply
    488.40x = 729.07 × 415.48
  4. Step 4: Simplify right side
    488.40x = 302,914.00
  5. Step 5: Solve for x
    x = 302,914.00/488.40
  6. Step 6: Final answer
    x = 620.22

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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.