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Finding the Fourth Proportional to 469.80, 647.84 and 304.09

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Solution

The fourth proportional to 469.80, 647.84 and 304.09 is: 419.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.80 : 647.84 = 304.09 : x
  2. Step 2: Convert to fraction form
    469.80/647.84 = 304.09/x
  3. Step 3: Cross multiply
    469.80x = 647.84 × 304.09
  4. Step 4: Simplify right side
    469.80x = 197,000.81
  5. Step 5: Solve for x
    x = 197,000.81/469.80
  6. Step 6: Final answer
    x = 419.33

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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.