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Finding the Fourth Proportional to 469.26, 647.68 and 272.80

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Solution

The fourth proportional to 469.26, 647.68 and 272.80 is: 376.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.26 : 647.68 = 272.80 : x
  2. Step 2: Convert to fraction form
    469.26/647.68 = 272.80/x
  3. Step 3: Cross multiply
    469.26x = 647.68 × 272.80
  4. Step 4: Simplify right side
    469.26x = 176,683.87
  5. Step 5: Solve for x
    x = 176,683.87/469.26
  6. Step 6: Final answer
    x = 376.52

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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.