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Finding the Fourth Proportional to 469.45, 647.85 and 262.45

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Solution

The fourth proportional to 469.45, 647.85 and 262.45 is: 362.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.45 : 647.85 = 262.45 : x
  2. Step 2: Convert to fraction form
    469.45/647.85 = 262.45/x
  3. Step 3: Cross multiply
    469.45x = 647.85 × 262.45
  4. Step 4: Simplify right side
    469.45x = 170,029.27
  5. Step 5: Solve for x
    x = 170,029.27/469.45
  6. Step 6: Final answer
    x = 362.19

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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.