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Finding the Fourth Proportional to 423.47, 633.99 and 277.39

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Solution

The fourth proportional to 423.47, 633.99 and 277.39 is: 415.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.47 : 633.99 = 277.39 : x
  2. Step 2: Convert to fraction form
    423.47/633.99 = 277.39/x
  3. Step 3: Cross multiply
    423.47x = 633.99 × 277.39
  4. Step 4: Simplify right side
    423.47x = 175,859.32
  5. Step 5: Solve for x
    x = 175,859.32/423.47
  6. Step 6: Final answer
    x = 415.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.