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Finding the Fourth Proportional to 469.20, 647.49 and 259.38

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Solution

The fourth proportional to 469.20, 647.49 and 259.38 is: 357.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.20 : 647.49 = 259.38 : x
  2. Step 2: Convert to fraction form
    469.20/647.49 = 259.38/x
  3. Step 3: Cross multiply
    469.20x = 647.49 × 259.38
  4. Step 4: Simplify right side
    469.20x = 167,945.96
  5. Step 5: Solve for x
    x = 167,945.96/469.20
  6. Step 6: Final answer
    x = 357.94

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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.