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Finding the Fourth Proportional to 469.48, 647.84 and 273

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Solution

The fourth proportional to 469.48, 647.84 and 273 is: 376.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    469.48 : 647.84 = 273 : x
  2. Step 2: Convert to fraction form
    469.48/647.84 = 273/x
  3. Step 3: Cross multiply
    469.48x = 647.84 × 273
  4. Step 4: Simplify right side
    469.48x = 176,860.32
  5. Step 5: Solve for x
    x = 176,860.32/469.48
  6. Step 6: Final answer
    x = 376.72

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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.