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Finding the Fourth Proportional to 467.17, 643.25 and 400.69

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Solution

The fourth proportional to 467.17, 643.25 and 400.69 is: 551.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.17 : 643.25 = 400.69 : x
  2. Step 2: Convert to fraction form
    467.17/643.25 = 400.69/x
  3. Step 3: Cross multiply
    467.17x = 643.25 × 400.69
  4. Step 4: Simplify right side
    467.17x = 257,741.84
  5. Step 5: Solve for x
    x = 257,741.84/467.17
  6. Step 6: Final answer
    x = 551.71

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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.